Vim

Making Vim more like TextMate (http://lists.macromates.com/textmate/2010-November/031618.html):

For my own Vim use, I use the Project plugin (which I'm not entirely happy with, but I don't like the other alternatives any better), PeepCode's "PeepOpen" to emulate TM's quick file switching, FuzzyFinder to bring comparable switching between buffers, SnipMate for snippets explicitly modeled after TM, and TagList for the equivalent of a function navigation popup.