I'm a VIM guy, I use it every day and couldn't code without it.
Here are some of my favorite and most valued/used scripts:
- Surround
- The NERD Tree
- Align
- MatchIt
- Rails
- SnippetsEmu
- Perl-Support
- C/C++
- AllML
- The NERD Commenter
- VCSCommand
- And of course my Twitter script.