Awesome
timetap.vim
A precise time tracker for Vim. Inspired by the TimeTap plugin for TextMate.
Once you've launched Vim you don't have to bother anymore starting/stopping timers or investing some arbitrary amount of time to fill your fancy time tracker.
Exactly. timetap.vim use auto commands to achieve these goals.
Installation
If you don't have a preferred installation method, I recommend installing pathogen.vim, and the simply copy and paste:
git clone git://github.com/rainerborene/vim-timetap.git ~/.vim/bundle/timetap
Vundle is very cool system to manage plugins as well.
You just run command :BundleInstall rainerborene/vim-timetap inside Vim.
And also put Bundle 'rainerborene/vim-timetap' into .vimrc.
Related links
License
Copyright (C) 2012 Rainer Borene and Takahiro Yoshihara. This plugin is distributed under the same terms as Vim itself.