www.vicoapp.com
Has Vi[m] bindings though doesn't actually work with any vim dot files.

Was open sourced after either not doing well enough or for whatever reason.

Sadly, it is mostly dead now. Last commit was in late 2014. Though at least issues and commits were happening a lot when it did become open. 3.5K+ commits. #textmate #mac #vim #dev #text_editors #alternatives #open_source #pub