I use both Linux and Windows; Firefox and Gimp. I am keen to help out with FOSS projects although my coding is strictly amateur!
I tend to be slightly disorganised, and have tried several wikis before finding UseModWiki. I have version 1.0 installed, and have looked at the code. It is easy to understand, even for me. I am only using it for a personal system, not public, and have used / added the following features.