I just found this recently: Odin-Libs. Oddly, it is a sub-page of Odin wiki, which was moved to docs. Seems this portion of the wiki was left behind and would explain why the last edit is a year old. I found a few potentially useful bindings there. Haven’t tested or used any.
What if we had a simple category here on the forums that was more specific than “Showcase”? Something called Bindings/Libraries (or whatever makes sense). Then have rules that the post title contain the name of the binding/library for easy searching. Those that submit then maintain their own thread.