http://hobbes.nmsu.edu/cgi-bin/h-search?key=zip2
Also available (6/24/2005) is UnZip version 5.52.
http://hobbes.nmsu.edu/cgi-bin/h-search?key=unz5
These are compressor / archiver utilities that are compatible with PKZIP.
Source: OS/2 Warp News and Rumors