xCHM is a viewer for Compiled HTML Help (CHM) files. It can show the contents tree if one is available, print the current page and do the usual history stunts. It allows one to change fonts and search for text in all the pages of the file, or in the page's titles.

Poe is a vorbis comment editor for GNUstep. It tries to follow the vorbis comment header specification closely, while being convenient and flexible to use.

A jnoisemeter is a small app designed to measure audio test signals and in particular noise signals.

MediaInfo is a utility used for retrieving technical information and other metadata about audio or video files.