The classic email sending library for PHP
E-mails, subdomains and names
Lightweight Open Source webmail written in PHP and JavaScript
Simple-to-use/-install issue-tracking system: web, REST, email, CLI
java example
Tools to convert Z mark-up to HTML or text.
Robust open source POP3 client and MIME parser written in C#
A free .NET library for accessing IMAP servers, written in C#