use Vim like an IDE

bufferexplorer
selectbuf
FuzzyFinder
minibufexpl

taglist

gtags (Integrates GNU GLOBAL source code tag system with VIM)

SourceCodeObedinece

0scan

NerdTree

Project

ctags, cscope

http://stackoverflow.com/questions/1457540/how-to-navigate-in-large-project-in-vim

http://vim.wikia.com/wiki/Use_Vim_like_an_IDE