cyrus2courier is a nice little tool to convert a single mailbox from Cyrus-Imap into the Maildir++ format used by the Courier-Imap and Dovecot IMAP servers.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
Support for Cyrus 2.0 sendb files and courierpop3sizelist files, improved error-handling, lots of small bugfixes and memory leak fixes, and a new shell script to simplify mass-migrations.
