Before Github, many OSS are hosted at Sourceforge. but IIRC, you need Sourceforge's approve to open a new project. Unlike Github, which you can open a public re

Before Github, many OSS are hosted at Sourceforge. but IIRC, you need Sourceforge's approve to open a new project. Unlike Github, which you can open a public repository by yourself. Then Ruby (and ruby gems?) is hosted at Github, as Ruby/RoR gets more attention, Github and Git become popular too.