Freshmeat page: http://freshmeat.net/projects/retchmail
Retchmail is the world's most stupidly fast POP3 retriever. It is almost completely unlike fetchmail: retchmail lacks features, isn't particularly robust (although it won't delete a message until sendmail says it was delivered okay), has nearly no documentation, and is actually very fast. Retchmail uses near-zero-latency, but not negative latency. It is based on the WvStreams C++ networking library.
This project has the following developers:
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