Movewin.vim is a project mainly written in Vim Script, it's free.
Move GUI window using the keyboard
This is a mirror of http://www.vim.org/scripts/script.php?script_id=741
Move GUI window using the keyboard, for those who don't like to use the mouse.
After loading the script, call :MoveWin. Use hjkl and shift+hjkl keys to move the window, press any other key when done.