Simple utility that enables one to view and extract RTF text and attachments from TNEF-encoded files (winmail.dat). Also supports command-line mode for batch processing. [Win]
PGP-Frontend is a plugin, which enables you to use PGP (Pretty Good Privacy) within Pegasus Mail. Supports email message and attachment encryption, decryption, signing, and verification, as well as others.
A POP3 email checker that can verify up to ten accounts following a specific time delay. List email messages by sender, subject, date, and size with a quick preview function.