SuperTab is a project mainly written in Vim Script, it's free.
Do all your insert-mode completion with Tab!
This is a mirror of http://www.vim.org/scripts/script.php?script_id=182
The script has MOVED (since Eric Van Dewoestine is the new maintainer).
So go to vimscript#1643 for the new version.
Thank Eric to taking over the maintainership!