Spruce is an X11 mail client written with the Gtk+ widget set. It is geared towards being extremely small and fast, supporting all the common features that users want or need without sacrificing usability or functionality
This is a Java Email client for academic purpose. It will include the general email client features and other experimental techniques such as uncertain reasoning, HCI principles. This project is not supported now.
This is an e-mail application, for checking your pop3 mails and so many protocols. Read and send mails with Akademi-Mail application. It is coded with Java.
CWMS is implementation of an e-mail client, as a Web application, that allows users to access their e-mail through a Web browser, as an alternative to using a desktop-based client, such as Microsoft Outlook, Mozilla Thunderbird or Eudora.
elmutt - mutt with elm features
ngc is an attempt to introduce a new way of visualizing multiple communication channels like email, chat or social networks in a central place.
Hey Everyone! Nirvana has moved to http://sourceforge.net/projects/nirvana It isn't here anymore.
Microsoft Exchange compatible server and client libraries
OpenChange is a portable Open Source implementation of Microsoft Exchange server and Exchange protocols. It provides a complete solution to interoperate with Microsoft Outlook clients or Microsoft Exchange servers. OpenChange client-side library is used in existing messaging clients and is the solution in new projects to communicate natively with Microsoft Exchange and Exchange-compatible servers. OpenChange server is a transparent Microsoft Exchange server replacement using native Exchange protocols and does not require any plugin installation in Outlook.
OpenSN is an Open Source version of SpamNet, the difference between OpenSN and SpamNet is that OpenSN will be available to all types of email applications that run from your desktop, and also run on all OSes. And plugs into email apps to help stop spam.
XCmail is a MIME and multi POP3 server capable mailtool for X11 using the Xclasses layout library. XCmail was designed completely object orientated and by this may be improved easily. <p> XCmail has its own server in the internet. Take a look on it.
netmaniamail is webmail. in deatil, web based email client. pop3 server, mysql, php4 required. perfect MIME supported. it looks like m$ outlook, but simple & easy to use.