vimper is super simple set of vim plugins. It should work properly on both OSX (preferably with macvim_) and Linux based systems.
Simply clone vimper repository somewhere and run:
$ python bootstrap.py
This would backup existing vim files installation and create links to the vimper's repository.
Want an one liner?
git clone git://github.com/restless/vimper.git ~/.vimper && cd ~/.vimper && python bootstrap.py