Gemeinschaft is a PBX based on Asterisk, MySQL, Apache, and PHP, and designed for high availability and clustering. It provides automatic provisioning for mass deployment, and can handle over 10,000 users. Administration is done via shell scripts or a Web GUI. Hot-desking and mobility are supported. German voice prompts are included. There is a standards-compliant Web GUI with internationalization (and German and English translations). Outbound and inbound routing with full PCRE support is included.
Callweaver is a community driven software PBX project. The most important differences between Callweaver and Asterisk are built-in STUN support, the use of SpanDSP for better codecs and full T.38 fax over IP support, Sqlite instead of Berkeley DB, universal jitterbuffer, POSIX timers to avoid Zaptel timing dependencies, greater speed, more efficient dialplan execution, and greater stability.
DrygerFax is a HylaFAX client for Windows which communicates through a special server running on Linux. It employs Samba and CUPS on the server to present a full-fleged network printer. Once a print job has been submitted, the server calls back to the client to ask for the fax information. Unlike some clients, this one does not need custom printer driver software to print, since the printer is presented as a generic Postscript printer. Unlike other clients, this one "phones home" to the user to get information needed to fax.
astfax allows you to create an email to fax gateway. It processes incoming email messages with attached fax images and sends them out via the txfax module. Asterisk's outgoing call queue is used to initiate the fax call and transfer. The call file generated for the outgoing call queue is in template form, and can easily be updated for any system's configuration. It can be used (for example) with qmail, asterisk, spandsp, and eps to create an email/fax gateway.
fax2png extracts a specified page from a 1-bit black and white TIFF image, such as a fax, and efficiently converts it to PNG format without the performance overhead of netpbm-based solutions. Antialiasing is supported to produce attractive reductions to typical Web browser widths. 90-degree-interval rotations and flips are also supported.