The cask description is misleading though. Cask deals with applications which are too complex to compile (/shrug) but provide an .app or .pkg, or with things th

The cask description is misleading though. Cask deals with applications which are too complex to compile (/shrug) but provide an .app or .pkg, or with things that only provide a compiled .app or .pkg (not open source) brew has GUI applications. Easiest one I can think of (because I use it) is Pidgin.