Thunderbird Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox. Free Open Source Mac Windows Linux BSD PortableApps.com ... Haiku Extensible by Plugins/Extensions Built-in RSS reader Support for IMAP Multiple Account support ... SMTP integration Built-in Calendar Calendar integration Categories Customizable Delivery reports Extensible by Plugins/Extensions Extensible by Plugins/Extensions Free API Gmail integration Google Calendar integration Import from Google Reader HTML Compose Integrated Chat Integrated Password Manager Integrated Web Browser Legacy addons support Export to OPML Import feeds from OPML POP3 Support Portable Secure File Sharing Tabbed interface Support for Themes Add a feature 1834 Like
HexChat HexChat is an IRC client based on XChat for Linux , but unlike XChat it’s completely free for both Windows and Unix-like systems. HexChat was... Free Open Source Mac Windows Linux BSD PortableApps.com ... Xfce MacPorts XQuartz Portable Add a feature 181 Like
Colloquy Traditionally, chat clients on the Mac have been anything but glamorous. Colloquy is an advanced IRC, SILC & ICB client which aims to fill this void. By adhering to... Free Open Source Mac No features added Add a feature 34 Like
