This guide will provide a of collection of websites that help somehow Steam's users. I'll be separating the websites by category with a brief description of each one.
Some of the websites bellow will ask you to sign in through Steam. When a website offer this resource, you'll se one of these buttons. So you don't need to worry, since this button will always redirect you to the official Steam address.
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And join my group Jogos Brasil (everything is translated) if you wanna giveaways and freebies.
The Best Of
Enhanced Steam[www.enhancedsteam.com] Created by:jshackles Steam Group Description: We can all agreed that this extension is indispensable, right? You can check all the features on his website.
IsThereAnyDeal[isthereanydeal.com] Created by:Tomáš Fedor & Zelgaris Steam Group Description: If you always want to buy that game that you really want for the lowest price, so you need to check this website, he'll show you when and how was the lowest price what game got.
Steam Database[steamdb.info] Created by:xPaw & Marlamin Steam Group Description: You won't find a better database than this one, simple as that. There's also a tool to check Steam status and another one to list all games on Sale.
Steam Spy[steamspy.com] Created by:Sergey Galyonkin Description: Gathers all the information about Steam games.
Achievements & Rankings
Achievement Stats[www.achievementstats.com] Created by:Chrissyx & m u n k y SteamGroup Description: Ranking of users based on points earned by achievements.
AStats[astats.astats.nl] Created by:Mytharox SteamGroup Description: Ranking of users based on achievements, games & country.
Completionist . me[completionist.me] Created by:luchaos Description: Detailed analytics and data visualization for Steam achievements.
Exophase[www.exophase.com] Created by:Mike Bendel Description: See how you rank up against other trophy and achievement hunters, plus stay updated on the latest lists.
MetaGamerScore[www.metagamerscore.com] Created by:Oskar Holmkratz & Linda Holmkratz & Martin Berglund Description: It combines the achievement in many platforms to make sure that everything you do in any game counts towards a total, persistent metascore.
Steam Chievos[steamchievos.com] Created by: ? Description: Check achievements that are easy or rare to get.
Steam Hunters[steamhunters.com] Created by:Rudey Description: Simple leaderboard to achivement hunters.
Steam Ladder[steamladder.com] Created by:TerryZ Description: Nothing difference than the other one (i think).
100Pals[www.discord.me] Created by:Xeinok Description: A live feed of every achievement-related change across all of Steam, cutting-edge achievement information/strategy, complex achievement bots. Warning: This is hosted on a Discord chat!
Steam Calculator[alabasterslim.com] Created by:AlabasterSlim Description: This one will show a list with a full valuer of your account and from every game full and discount prices.
SteamDB Calculator[steamdb.info] Created by:xPaw & Marlamin Description: This one cointains a total valuer of your account and a total valuer with sales. Also there's a nice pop-up that randomly will show a game that you have to play if you're bored.
Steam Calc[steamcalc.de] Created by:Thomas Weinmeister Description: Check how much you spend on Steam.
Steam Gauge[www.mysteamgauge.com] Created by:Jon Prusik Description: Basically the same as the previous ones. It will show a detailed description of ever game that your own.
Wasted Time on Steam[steamtime.info] Created by:dedg3 Description: A tool for easy Steam time calculation.
Compare & Bundle List
Compare 2 Steam[compare2steam.com] Created by:Inkvolcano Description: The best site compare a list of games with your account so you won't trade a repeat one.
Game List Compare Tool[www.thefunkygibbon.net] Created by:thefunkygibbon Description: A simple copy and paste to check game list.
Steam Compare[www.nerdchan.net] Created by:Fedexx2 Description: Easy way to compare list of game with another user.
Steam Games Comparision[hideous.sereneworx.com] Created by:Hideous Description: Simple and easy tool to compare a list with another person.
Steam Games in common[altru.istic.net] Created by: ? Description: It will tell you which games you have in common with another person.
Wanna complete that game or have a data base of what you are playing?
SteamChecklist[www.steamchecklist.com] Created by: ? Description: You're a completionist? So this website help you to check a game that you complete/beat.
Steam Backlog[steam-backlog.com] Created by:Gohrum Description: Steam Backlog provides easier and better way to browse our always growing steam libraries while helping decide what to play next.
Coupon Dumpster[new.steam.nyan.link] Created by:Yusyuriv (Site) / InCrt & Biowizard & Xsesis & Shadow_Dragon_SM (Group) Description: The best place to donate and request coupons. You need to be part of their group. Super organized and friendly people.
Game Coupon Grid[www.gamecoupongrid.com] Created by:Dmytro IELKIN Description: Easy way to find or share Steam coupons.
List of Every Coupon[pastebin.com] Created by:Nephrite Description: The title says all, is a updated list of every existing coupon.
Steam Coupons[steam.psyk.yt] Created by:PsyKitty Description: Compare coupons with your friends, find games you don't own with discounts.
Addons or Extesions is for browsers like Google Chrome, Mozilla Firefox and Opera (<3). If you're using Opera and find a extension only supported on Chrome, use this extension[addons.opera.com] to be able to install any Chrome's extension.
Ban Checker for Steam (Chrome & Chromium based) Created by:ge-ku Description: Automatically check bans of people you recently played with (or your friends).
Better Buy Orders (Chrome & Chromium based) Created by:Step7750 Steam Group Description: Improves Steam market buy orders (hot-swap view different currencies and extended listings).
Browser & Client Skins to Remove the Clutter/Blue from Steam Created by:Raydell Description: This will apply a custom styles to your browser or client to remove the clutter/blue from Steam website.
Community Market Search[lab.nyan.link] (Chrome & Firefox & Opera) Created by:Yusyuriv Description: Allows you to easily search things on the Community Market with just two clicks.
Fair Steam (Chrome & Chromium based) Created by:Dbalz3 Steam Group Description: Adds real gameplay video for games on Steam.
SARA • Steam Account Robotic Assistant[github.com] (Chrome & Chromium based) Created by:Pandiora Description: Enhancing and automating your Steam Experience with focus on managing multiple Steam-Accounts.
Sliwipi[lab.nyan.link] (Chrome & Firefox) Created by:Yusyuriv Description: A browser extension that makes large Steam game libraries and wishlists fast.
SuperSteam[addons.mozilla.org] (Firefox only) Created by:Dbalz3 Steam Group Description: Improving the Steam User Experience by giving the user information that can help make purchase decisions. Super Steam is based on Enhanced Steam by jshackles.
Steam Activity Filter Chrome & Chromium based & Opera[addons.opera.com] & Firefox[addons.mozilla.org] & UserScript[raw.githubusercontent.com] Created by:ZeroUnderscoreOu Steam Group Description: Filter for friends' activity in Steam. Allows to load activity for selected days and display needed part of it.
Steam Anti-Scam Project[steam-antiscam.eu] (Chrome & Chromium based) Created by:Forced2Kill Description: The Steam Anti-Scam Project tries to prevent Fraud/"Scamming" on the Platform Steam.
Steam Context Menu Chrome & Chromium based & Firefox[addons.mozilla.org] Created by:Skylark95 Description: Search for games on Steam, SteamDB, or IsThereAnyDeal using the context menu.
Steam Database Extension[steamdb.info] Created by:xPaw & Marlamin Description: Adds Steam Database links on various pages in the Steam Community and Store. Also highlights owned and wished products on steamdb.info.
Steam item search between friends & in groups (Chrome & Chromium version) Createdy by:forever14k Description: This extension allows to find items you looking for in all friends & Steam group members inventories on the same time.
Steam Ninja! (Chrome & Chromium based) Created by:Beans Description: Features for auto-purchasing, popup for badge search and item (backgrounds, emoticons, trading cards) overview including prices.
Steam Popularity Filter Chrome & Chromium based & Firefox[addons.mozilla.org] Created by:Necroblight Description: Gives the ability to filter search results based on popularity of games.
Steam Trader Helper for Google Chrome & Opera[addons.opera.com] Created by:commaticus Description: Steam Trader Helper it's extension for auto-buying, auto-selling and usability on the Steam Community Market.
Steam Watcher[addons.mozilla.org] (Firefox only) Created by:retardTonic Description: This simple add-on notifies about incoming friend requests, trade offers and new items in inventory.
VacBanChecker[github.com] Created by:MrHayato Description: A bookmarklet to check for steam vac bans.
Extensions section got really big, so i had to separate the sub-section.
This require to install the extension Tampermonkey[tampermonkey.net] or Greasemonkey[addons.mozilla.org] (Firefox only).
Add Wishlist Buttons[greasyfork.org] Created by:Royalgamer06 Description: Adds Wishlist Buttons to Steam Store.
Better Buy Orders[github.com] (Firefox only - other browsers on the Extension list above) Created by:Step7750 Steam Group Description: Improves Steam market buy orders (hot-swap view different currencies and extended listings).
Bundle Helper[greasyfork.org] Created by:7-elephant Description: Add tools for many bundle sites.
Enhanced Steam Dropdown Mover[greasyfork.org] Created by:Royalgamer06 Description: Moves the Enhanced Steam dropdown into the steam profile dropdown (and simultaneously makes it compatible with custom Steam skins).
Fade Owned Items[userstyles.org] Created by:vhs Description: It fades items on Store that you already have.
Flat Steam UI[userstyles.org] Created by:creo318 Steam Group Description: Flat, clean and simply Steam Store and Community redesign.
Game Owned Checker[greasyfork.org] Created by:Royalgamer06 Description: Check all steam store game links if it's owned.
Group List Sorter[greasyfork.org] Created by:Royalgamer06 Description: Sort your group list by group name, creation date or total members.
Steam - Default language[greasyfork.org] Created by:Royalgamer06 Description: Make sure you always see the steam page in your preferred language. You can configure the language in the language variable.
Wishlist Exporter[greasyfork.org] Created by:Royalgamer06 Description: Export your wishlist in a text list.
I do NOT recommend the use of any software that "bypass" the Mobile Authenticator, since the whole purpose of the security is to NO ONE besides you can get access to your real phone and by using an software to get the codes goes against this purpose of security that Valve implemented. Even if I'm not recommending the use of it, the softwares below works like they say and has no virus or anything on it.
Steam, pls[steampls.com] Created by:Jesse Cardone & Josh Coffey (Creators of Scrap.TF & SDA - the software in this section). Description: A step-by-step guide that will walk you through the entire process of setting up a Steam authenticator.
Play A Game
Bored? Don't know what game to play? Why did you bought so many games on Sale? You can use one of those websites to choose randomly a game to play from your library.
There's even a official "tool" from Valve, just click here and you'll be redirect to a random game.
Pick A Game[pickaga.me] Created by:Smaczny & Only & Julian
Play A Game[playagame.josephtran.io] Created by:josephtran
Steam ID[www.steamid.co.uk] Created by:Martin Description: Steam ID is a steam account finder tool where you can see all the infomations about Steam profiles.
Steam Rep[steamrep.com] Created by:Ðiego™ Description: A place where you can report a bad user so he can stay with a bad reputation on the site.
Steam Reputasi[steamreputasi.com] Created by:Septhian Steam Group Description: A site that assist or prevent any scam attempt in steam trading, especially in indonesia. WARNING: Language only in Indonesian.
VAC Banned[vacbanned.com] Created by:Surian & AnAkIn Description: VACBanned check if a SteamID is VAC banned or not, if is banned and not on the list, it will be automatically added.
Servers / Scripts
SteamAuth[github.com] Created by:geel9 Description: A C# library that provides vital Steam Mobile Authenticator functionality.
Steam Achievement Lister[github.com] Created by:Krakob Description: A Python script who converts your achievement progress to the Google Tasks list.
Steam Activations Status[github.com] Created by:Royalgamer06 Description: Post a summary of new activated games to your Steam Friends Activity every x hours.
Steam Spy[steamspy.com] Created by:Sergey Galyonkin Description: A recent new tool and very useful that shows great statistics.
Steam Charts[steamcharts.com] Created by:james4k Description: Measure the trends of games on Steam.
Gauge Powered[www.gaugepowered.com] Created by: ? Description: Gauge can help anyone with a Steam account make better buying decisions, and even save some money.
timeSteam[www.timesteam.net] Created by:ahitmaker Description: This site may help you locate those deep, replayable games that may fall under the radar but are heavily played by their fans. A lot of playing time might mean good replayability and depth which could indicate quality and value for money.
ArchiSteamFarm[github.com] Created by:JustArchi SteamGroup Description: Allows you to farm steam cards. Can use multiple steam accounts simultaneously. Doesn't require and doesn't interfere in any way with Steam client.
Idle Master[www.steamidlemaster.com] Created by:jshackles Steam Group Description: The most famous aplication for idle your games so you can drop trading cards. It doens't longer receive updates but still works.
GKeyBank Created by:Alfred Wallace Description: Tool to manage collections of steam keys/link.
HourBoostr[github.com] Created by:Ezzpify Description: This will allow you to boost the hours played of multiple Steam games on multiple accounts at the same time, without even having steam open!.
Playnite[playnite.link] Created by:Josef Nemec Description: Open source video game library manager and launcher with support for 3rd party libraries like Steam, GOG and Origin, providing one unified interface for your games.
Punk[github.com] Created by:scholtzm Description: Alternative cross-platform Steam client for desktop.
SCOPHE - Steam COpy Paste History Exporter[dreamspace-president.com] Created by:Dreamspace President Description: Exports your "Purchase History" and "Licenses and product key activations" as CSV files, also calculates the amount of money you have actually spent on Steam.
Screenhive[screenhive.net] Created by:Brian Mock Description: Screenhive is an organizer for Steam PNG screenshot folders, available for Windows and Mac.
SlaloM - Steam launcher and library organizer Messiah[gamelibrarymanager.com] Created by:Dreamspace President Description: One frontend for all game clients (and manually installed games) with special Steam support. Rename games, show screenshots immediately on game selection (incl. fullscreen&slideshow), browse games by screenshot gallery, create/group/assign TAGS (filtering and/or/not), can automatically add games based on root folders you define (Unique feature!), filter by app type (DLC, game, ..., owned, installed, ...), text filter (and/not), 30+ optional columns, 4 level sort (e.g. first by drive, then by installation size, then by name or purchase date or even random), filter by Steam store tags (e.g. "Multi-player"), can take screenshots in some cases where Steam doesn't, review system, etc.
StarCategorizer[github.com] Created by:Mastercorp Description: Autocategorizes your games in your Steam library.
SteamCleaner[www.kl0wn.com] Created by:opcow Description: Runs in the background and closes steam event popups.
SteamCompanion[github.com] Created by:Knudow SteamGroup Description: Do you have hundreds of games and you don't know what half of them even look like? SteamCompanion can help you.
SteamEdit[steamedit.tg-software.com] Created by:Tim Green Description: SteamEdit is a small tool for editing some information about your game collection in Steam. You can only change information stored locally – changes you make will not be visible elsewhere.
SteamFlix[dshenkle.github.io] Created by:dshenkle Description: A launcher for steam big picture users that brings up Netflix in full screen mode.
SteamGameLauncher[github.com] Created by:Gabisonfire Description: Creates a launch pad for your installed games.
SteamGrid[github.com] Created by:boppreh Description: SteamGrid is a small standalone program to enhance Steam's grid view and Big Picture.
Steam Paint[minu.me] Created by:Marmaduke Description: A easy tool to create a paint with emoticons.
Text Pastebin[paste.mattie.net] Created by:Mattie Description: Turn text into emoticons.
Awesome Reconnect[steamedit.tg-software.com] Created by:goncalomb Description: Insert your SteamID, the site will ping your Steam profile every minute, keeping track of the last game/server that you were playing on, allowing you to rejoin if the connection is lost.
Buy All Steam Games[steam.seewang.me] Created by:cwang22 Description: Ever wonder how much does it costs to buy all games from Steam?.
CYROGENiX Steam Tools[steam.cyrogenix.com] Created by:Asamak Description: Browse your Steam Library by tags and choose games by screenshots.
Cu Steam[custeam.io] Created by: ? Description: Custom home page for your Steam Overlay browser, which automatically adapts to the game you’re playing.
Free Steam Games List Created by:IvanDoomer Description: Maintained list of free games on the steam forums.
Friend Since[jes.re] Created by:Jesse Cardone Description: Shows a list of a user's steam friends, sorted by time they have been friends.
Got That Game[www.gotthatgame.com] Created by:Erik Ralston Description: Instantly find the games you have in common with your friends.
Humble Games[calvein.github.io] Created by:Calvein Description: You can check every game of Humble Store there (widgets format).
In Use or Not[inuseornot.com] Created by:Moss mane Steam Group Description: Check if the username that you want to use is available.
KeyGiveaway[www.keygiveaway.com] Createdy by:cillosis Description: A platform for drop game keys to the community, the first person to successfully decode the clue and enter the key gets it.
Keyboard vs Controller[keyboardvscontroller.com] Createdy by: ? Description: Allows you to search for any controller-supported Steam game and share your personal preference, then compare with others from all around the world.
Key Radar[keyradar.com] Created by:Tyrx Description: A very useful tool that will show to you if a store is a authorised seller or not. Avoiding to buy stolen keys like recent events with Far Cry 4 & TES Online that got their keys revoked.
Micro Game Trailers[microgametrailers.com] Created by:Mike Description: All the latest game releases into 10 second micro game trailers and GIFs.
Removed Games/DLC/Software[removed.timekillerz.eu] Created by:TheAnthonyNL Description: Check removed apps you have in your account.
Pepeizq's apps[pepeizqapps.com] Created by:Pepe Description: Apps (to Windows 10) and shortcuts.
SteamBro[www.steambro.com] Created by:JSR-Productions Description: SteamBro classifies all sales discounts on Steam.
SteamLevels[steamlevels.com] Created by:Nacho Steam Group Description: Calculate how much XP and Cards you'll need to level up to a specific level.
Steamly[steamly.herokuapp.com] Created by:mahmedov Description: Easily find prices of games and people's game list of best games.
SteamLytics[steamlytics.xyz] Created by:Korrasami Steam Group Description: Tool for developers that analyze data of APIs.
SteamGrid DataBase[www.raresites.us] Created by:doZennn Description: A place to upload/download Steam grid images for your client.
Steam Achievements for Facebook[github.com] Createdy by:jrummell Description: Steam Achievements is a Facebook app that displays and publishes achievements for Steam games.
Steam Error Codes[steamerrors.com] Created by: ? Description: Listing and description of EResult values
Steam Friends[steamfriends.net] Created by:ThorsHammerdin Description: Find Steam users to play with.
Steam Gadgets[steamgadgets.com] Created by:Sergio Susa Description: A few useful Steam tools: Accounts Games Compare; Achievement Tracker; Crafting Level Calculator; Game Trader; Level Badges List; Owned Game Checker.
Steam Kiwi[www.steamkiwi.com] Created by:Etaew Description: The website collects game news, developer posts and curator recommendations and sorts them into a personalised feed.
Steam Left[steamleft.com] Created by: ? Description: Funny site that show how long will take to beat every game from your game.
Steam Library Filters[www.lorenzostanco.com] Created by:Lorenzo Stanco Description: Search your games by their tags.
Steam Locked[steamlocked.com] Created by:auu788 Description: Find if the game is locked locked and in which region.
Steam Profile Background[martyn.pw] Created by:Martyn96 Description: Get the background image from any public Steam profile page.
YASP[yasp.co] Created by: ? Description: Another stats page.
I will be moving here every closed and dead website/application from this guide. That said, only websites that was already on this guide (if was online once and got offline later on) will be here, i won't add a dead website that wasn't here before.
[NOT WORKING] Steam Header Downloader Created by:darkarchon Description: Take a screenshot of every game that you own. Windows only. Original download link is down on the moment i write this guide, go to the last page of the thread to see a new link.
[CLOSED] Steam Exchange Point[steamep.com] Created by: ? Steam Group Description: Trade steam trading cards and dota 2 player cards with a private profile/inventory.
Steam Feeder[www.steamfeeder.com] Created by:PlayGrid Description: Generate a RSS Feeds for each of your games forums on Steam.
Playfire Playfire is was a Green Man Gaming (GMG) tool that reward money to spend on GMG's website just by completing achievements.
Playfire was discontinued.
Playfire Rewards Tool[steam.madjoki.com] Created by:madjoki Description: Far better than the original from Playfire's website.
Steamlessness Companion[steamlessness.appspot.com] Created by: ? Description: This one separates achievements by colors.
You know any other site? Comment bellow so i can edit. If you own any of these sites and do not want it to have shared in this guide, please let me know so I can remove.
PS: Do not 'copy' my guide just to translate to your native language. Brazilian Portuguese is my native language and i didn't saw the need to create in pt_BR too.