TeaTime is a file encryption/decryption program based on the XTea cipher.
Including Modula-2 source!
Hobbes Search:
http://hobbes.nmsu.edu/cgi-bin/h-search?key=teatime-0.05.zip
Hobbes:
http://hobbes.nmsu.edu/pub/incoming/teatime-0.05.zip
Source: OS2VOICE