Zipgenius is yet-another-archiver. Supports 21 different compression formats, plus a pretty long list of extras, such as FTP support, email, backup functions, and more. The long list of features might make you expect a price tag, but ZipGenius is in fact free!

Version 5.5.1.440 of ZipGenius is shipping as of June, 2004.

http://www.zipgenius.it/

BonkEnc is an audio CD ripper and an encoder for various audio formats. It can produce Ogg Vorbis, MP3 and BONK files. More formats are available through plug-ins.

http://www.bonkenc.org/

ZipGenie is yet another archiver that supports a scad of formats, including zip, cab, arj, lha, lza, arc, gz, tar, zoo, gzip, rar, tgz, ace, jar, pak, and z. The author says that the download is multilingual, with help in German, English, Spanish, and French.

http://www.databecker.de/frames.php?PHPSESSD=49485252505251515350594949535059565452

This master’s thesis is available in PS format here. The abstract entry is in English, the Postscript document is in Spanish.

http://www.dcs.shef.ac.uk/~miguel/papers/msc-thesis.html