Lily's garbage collection mechanism is not sufficient for commercial use. The documentation is incomplete. They claim, very conformant. Also included is an extension to byacc that produces graphical parse trees automatically. Xcoral provides variables width fonts, menus, scrollbars, buttons, search, regions, kill-buffers and 3D look.
Commands are accessible from menus or standard key bindings.
Also includes HTML and Latex modes. This list includes interactive tutorials, public-domain code collections, books etc. Many gnu files are now compressed with gzip. Please do not use the master archive without good reason. Most GNU programs are CopyLeft'ed.