This mod is a very simple addition to the game that will allow you to make your game run in borderless windowed instead of the default fullscreen available in Minecraft.
This mod uses Forge and should be compatible with all mods you're using! Just add it to your pack or mod folder and you're good to go.
Please head over to the issue tracker if you found a bug in the mod so it gets fixed.
You are free to include this mod in any modpack without my explicit permission. I would like to hear about it, just out of curiosity.