Gtk2Hack is a nice graphical frontend for the popular rogue-like role playing game nethack using the modern GTK2 toolkit. It was inspired by other window ports like QtHack and Gnomehack.

It aims to provide an improved visual interface while maintaining complete keyboard controllability. It also adds the ability to leave the inventory window up while playing, has nice bars for hitpoint and power display and features a nicer equipment window with the stuff you are currently wearing/wielding.

License: free

Additional System Requirements: gtk+2.0 (2.4 for menubar)