PHPMail2Fax is a drop-in replacement for HylaFax's mail2fax written in PHP for the PHP CLI. It will support pdf and tiff and have the ability to handle MIME e-mail. All contributions are welcome.
Send and receive faxes using spandsp library, record, playback and connect calls (conference) with this commandline linux application for capi the CAPI 2.0 interface. Also runs on Embedded Systems (e.g. AR7 or German FritzBox).
mimx is an open-source, drop-in replacement for corporate communication servers such as Microsoft Exchange and Lotus Notes. mimx provides e-mail, chat, fax, network news, calendaring, etc. to clients such as Microsoft Outlook.