XVim
Xcode plugin for Vim keybindings
...All the code and documents on these tags are well arranged. Usual XVim user should use one of releases. Any other branches are temporary branches to develop features or bug fixes which will be merged into 'develop' branch after all. XVim supports Bountysource. If you want to solve your issue sooner make bounty on your issue is one option. A contributer should work on it preferentially (not guaranteed though). To make bounty visit following link and go to "Issue" tab. Select your issue and make bounty on it.