OmniGraffle: http://www.omnigroup.com/
arc_bits
: Utilities for drawing individual arcsradio
: Utilities for drawing radio phenomena (e.g., radio waves)
OmniGraffle scripts belong in ~/Library/Scripts/Applications/OmniGraffle Pro. The easiest way to install these scripts after cloning the og-cs repository is:
$ cd "~/Library/Scripts/Applications/OmniGraffle Pro"
$ ln -s /path/to/og-cs .
Then make sure you see the script menu in the menu bar when you're in OmniGraffle. If you don't see it, open the AppleScript Editor and enable it.