Gammu (formerly known as MyGnokii2) is a cellular manager for various mobile phones/modems. It supports a wide variety of Nokia, Symbian, and AT devices (Siemens, Alcatel, Falcom, WaveCom, IPAQ, Samsung, SE, and others) over cables, infrared, or BlueTooth. It contains libraries with functions for ringtones, phonebook, SMS, logos, WAP, date/time, alarm, calls, and more (used by external applications like Wammu). It also includes a command line utility that can make many things (including backups) and an SMS gateway with full MySQL and PostgreSQL support from the PHP interface.
Wammu is a mobile phone manager that uses Gammu as its backend. It works with any phone that Gammu supports, including many models from Nokia, Siemens, and Alcatel. It has complete support (read, edit, delete, copy) for contacts, todo, and calendar. It can read, save, and send SMS. It includes an SMS composer for multi-part SMS messages, and it can display SMS messages that include pictures. Currently, only text and predefined bitmaps or sounds can be edited in the SMS composer. It can export messages to an IMAP4 server (or other email storage).
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.
Vodafone Mobile Connect Card Driver for Linux makes it easy to get connected with any of the GPRS/3G cards supported. Besides managing connections with different technologies like GPRS, UMTS, and HSDPA, this applications supports receiving and sending SMS, access to contacts, and offers diagnostics information for troubleshooting.
Divmod Sine is a standards-based voice-over-IP application server, built as an offering for the Mantissa application server platform. It owes much of its development to the Shtoom project, which implements a soft-phone in Python. Sine provides a SIP registrar, SIP proxy, third party call control, voicemail, and configuration through the Web based on Divmod Mantissa.