The SMSj library allows you to send SMSes (GSM) from the Java platform. It gives you full control over the SMS including the UDH field so you can create and send EMS messages, Nokia ringtones, and images. It provides a pluggable transport layer that allows it be used with a range of different SMS servers.
VoiceBuntu (formerly Ubunterisk) is an Ubuntu-based live CD that uses Asterisk and VoiceOne to provide VoIP service without any system installation process. VoiceOne is a Web-based GUI for the Asterisk PBX. Ubunterisk can be used as a phone client as well as a PBX server. Ubunterisk can be administered either remotely or by accessing its local GUI. A capser-rw filesystem is used to store the system's data persistently.
IWar is a "war dialer" used for auditing your PSTN (phone) network. Its features include random/sequential dialing, Voice over IP using the IAX2 (Intra-Asterisk eXchange) protocol, ASCII flat file and MySQL logging, a curses-based front end, key stroke marking, multiple modem support, several methods of "tone detection", save/load state, banner detections (to determine remote system types) and blacklist support.
python-gammu is a set of Python bindings for Gammu, the GSM mobile manager for various cellular phones. It can work with any phone that Gammu supports, including many models by Nokia, Siemens, and Alcatel. python-gammu is now part of the Gammu project and it does not have separate releases anymore.
This package contains generic Linux drivers for the Conexant (formerly Rockwell) Softmodem HSF modem family, which are used by many modem and computer system manufacturers. They should work on most current Linux distributions, based on the 2.4.x kernels. A Pentium processor with the MMX enhancements is required. Some systems may require kernel recompilation with special ACPI patches. Preemptible kernels are not yet supported.