Easy resizing of emacs windows.
(require 'windsize)
(windsize-default-keybindings)
Then use C-S-<left>, C-S-<right>, C-S-<up>, and C-S-<down> to
move window edges.
Resizes by 8 columns or 4 rows by default. Change that by setting
windsize-cols and/or windsize-rows.
GPL, of course.