We did something to comply with these mods:

Beautiful Outdoors: same as Nature is Beautiful

Better Pawn Control:
If present, Windows gain a "close on emergency" command, that sets them to be closed whenever the alarm is turned on. Very useful reacting to raids!

Blueprints was patched for compatibility.

Dubs Skylights*:
The windows will require glass panes. The skylights and the smelt glass recipe will require the Glassworks research (except if also using Maaxar's Dubs Skylights Glass+Lights Patch and Glass+Lights). Skylights cost increased.

Expanded Roofing*:
The Transparent Roof Production research now will require the Glassworks research. Its cost was reduced to compensate for that. This means Transparent Roofs will only be possible after the windows. As a side effect, transparent roofs no longer produce those ugly shadows!

Glass+Lights:
The windows will require glass, reinforced windows will require reinforced glass. G+L's Glassworks research project replaces the one added by this mod. Also, if G+L is present, it will affect other mods:

• For Dubs Skylights, glass replaces glass panes and the smelt glass recipe is removed (this means you no longer need Dubs Skylights Glass+Lights Patch).
  
• For Raise the Roof, glass replaces Synthread to build transparent roofs.

Just Glass:
Same as Glass+Lights, except no reinforced glass.

Locks was patched for compatibility.

Nature is Beautiful [1.0], Nature is Beautiful [1.0+]:
If one of them is present, the windows will calculate their beauty by summing up the beauty on their field of view. The pawn's sensitivity to beauty will be reduced to compensate (you can change this on the mod's option panel).

Raise The Roof:*
Building both transparent roofs will require the Glassworks research.This means Transparent Roofs will only be possible after the windows. Also, if one of the glass mods is present, glass will replace Synthread to build them.

ReBuild: Doors and Corners:*
Windows will require their glass material to build, but the glass-producing recipes will require Glassworks research. The illuminated areas from windows and glass walls won't interfere with each other and retain their distinct effects.

[KV] RimFridge:
Wall refrigerators get the same treatment as the windows, vents and coolers: now they're actually linked to the walls!

*Light passing through skylights, transparent roofs and glass walls will also suffer a 10% level reduction, just like with the windows (you can change this on the mod's option panel).

There are issues when running these mods alongside Open The Windows and we can't solve it on our end (or we're still working on it, and if that's the case it will be noted):

Combat Extended: For some reason, there is only line of sight through one side of the small windows. Larger ones seem to be alright. Its up to them to fix it!

Perfect Pathfinding: reportedly slows down processing when used along the windows, since the 2.0 update.

On RimWorld v1.0 only, these mods are not compatible, regardless of the load order:

Star Wars - Fully Functional Lightsabers
Opened Doors Don't Block Light