Almost every plugin and gem developed for Rails is available via GIT. Will_paginate is also there.
When we would like to install something under Windows OS, it can be slightly difficult.
When we execute something like this:
ruby script/plugin install git://nazwapluginu.git
It will fail. However adding slash after ".git" will fix this issue.
ruby script/plugin install git://nazwapluginu.git/
Under Windows 7 slash is not needed any more :)