Anti-Spam SMTP Proxy Server implements multiple spam filters
SMTP email proxy and relay server
Sync Outlook with Google, SOGo or any other CalDAV / CardDAV server
Powerful Open Source Email Marketing app with analytics & segmentation
Anti Spam SMTP Gateway
OpenXP 5 - a multi-protocol offline mail and news reader
Add keyboard shortcuts to switch between different thread views
IGSuite is a web-ajax-based Integrated Groupware Suite
Strong Email & Apache Log Analysis with Active Security Features
Sasa is a collection of organized extensions to the .NET framework.
Email Notifier For Windows
Unified Communications Server