Pardon our dust: this are still being put together around here and a lot is still missing. Specifics may not be present, but if you're looking for a topic in general its bound to be present.
Just curious? Hit the Random Button.
Looking for installation or usage info? Documentation is the right place to be.
Skribki is a powerful and easy-to-use wiki software (you're using it right now!), free and open-source.
Lynxii is still in early development stages and no details nor documentation is available.
WeToDo is a simple and collaborative time and task tracking app. Available on mobile and desktop.
There's a few other things about here, too. These aren't really high-priority though, so don't expect much.
Shadows of Maya
A collection of information on SoM can be found on the Shadows Of Maya Topic Page.