Glass Pane is a common open source API allowing mods to create appealing UIs with very little code. If this mod appeared without you installing it, then you must have installed a mod that uses it.
GlassWorks by oitsjustjose
oitsjustjose's GlassWorks mod, adding various Connected Texture glass blocks, pillars, and more!
Glenn's Gases introduces gases into the Minecraft world. In real life mining, gases can be extremely dangerous. Without doubt, it will be a challenge in Minecraft too. Glenn's Gases adds problems to make mining much harder, as well as solutions to these problems. Will you stand up to the challenge?