These are my most used VIM scripts:

taglist (utility)
matchit (utility)
vcscommand (utility) (vim7)
xmledit (ftplugin)
snippetsEmu (utility) (vim7)
remote PHP debugger (utility)
PDV (phpDocumentor for Vim) (utility)
NERD tree (utility) (vim7)
LaTex-Suite (ftplugin)
vimcommander (utility)
tetris (game)