Client daemon to move mail from POP and IMAP to your local computer
software for email automation (newsletters, transaction mails, etc.)
Python API for Sendmail Milters.
System to control who and when a group reads a document send by mail
Secure mail + Tor gateway
ImpraStorage provided a private imap access to store large files
E-mail based announcement software.
A MemberAdapter and cronjob to contact an ldap server for mailman
Sends external IP changes via email, using Imap.