I was hunting for a few cool Vim scripts and these are some of the hottest that you will find.

NERD tree and VimExplorer for browsing your entire directory tree without leaving your home row.

Buffer Explorer makes switching between buffers really quick.

But my favourite of them all would be Cvim. If you are a C/CPP developer here is an IDE in Vim.

This page has a list few more cool scripts.