Hermes is a basic SMTP/POP3 server with source code. It's free to use. Read the license. Send bug reports or improvement suggestions.
emailarms
IM-Soft
JAM Software GmbH
getfreefile
Axigen - Gecad Technologies
Etype
MailEnable Pty. Ltd.
4Easysoft Studio
3C Games
BBASoft Inc.
Apycom Software
Export OST to PST Utility
SoftVR
Recover Data
O Imaging
ALAUX Michel
MyVocaNet