The Alamin GSM SMS Gateway is a group of daemons that allows you to send/receive SMS messages from any GSM device that supports AT+ commands (GSM modems or GSM mobile phones) or supported by Gnokii. A client program allows you to send messages from any IP client. An SMTP interface is provided to allow MTAs to send SMS directly to the GSM network. IMP (Incoming Message Processor) modules allows you to extend functionality to implement banking, network administration, bd querys, etc. from a GSM mobile phone.
Asterisk::LDAP is a perl module for generating Asterisk 1.0 compatible configuration files from an LDAP directory tree. The package includes everything you need to get started, including the module itself, schema files, and example code. Functionality is provided to see if a reload is necessary and optionally send asterisk a 'reload' command when updates are made. Included is a script that can be called from voicemail.conf's externpass option to update a user's voice mailbox PIN number in LDAP. Asterisk::LDAP is currently capable of generating extensions.conf, voicemail.conf, and musiconhold.conf. Support is planned for sip.conf, iax.conf, and meetme.conf.
Bluel VMail is a semi-complete voicemail system that supports automated attendant, call transfer, e-mail delivery of voicemail messages, etc. It was designed to work with the Diamond SupraExpress ISA modem and Panasonic KX-T61610 hybrid phone switch (cheap!), but is probably portable to similar configurations.
CT Server is a Perl module that interfaces with Voicetronix computer telephony cards, giving developers a method of creating quick and creative computer telephony applications. A complete PBX is included as an example, which includes a Web interface for configuring and monitoring the PBX.
Delator is a telephone/PBX call accounting system. It works with a PBX Lucent Definity G2 and a serial connection to store information in a PostgreSQL database. It has a Web interface which can give monthly reports of the use and cost of each call, from what extension each call was made, what number was called, etc.