Computers

A free (as in freedom) mailing list site for open source projects.

A mail filter/local delivery agent with a perl-ish filtering language and maildir support. (C++) [GNU/Linux, Unix]

A utility to get rid of unwanted spam mails, before downloading them from the POP3 mailbox. (C++) [GNU/Linux, Unix, Windows 9x/2000/NT]

Synchronizes a collection of mailboxes, which may be on the local filesystem or on an IMAP server. (C++) [OS Independent]

Open-source email and calendar client. Strong on IMAP4 handling. Windows, Linux, Mac OSX.