GNU oSIP is an implementation of the SIP protocol. It is used to provide multimedia and telecom software developers with an interface to initiate and control SIP sessions.

This package provides a VoIP media traffic NAT traversal server and gateway. It implements the STUN (Session Traversal Utilities for NAT) and TURN (Traversal Using Relays around NAT) server protocols.

GNU ZRTP C++ provides a library that adds ZRTP support to the GNU ccRTP stack and serves as library for other RTP stacks (PJSIP, GStreamer).

Seren is a simple VoIP program based on the Opus codec that allows you to create a voice conference from the terminal, with up to 10 participants, without having to register accounts, exchange emails, or add people to contact lists. All you need to join an existing conference is the host name or IP address of one of the participants.

Sofia-SIP is a SIP User-Agent library, compliant with the IETF RFC3261 specification. It can be used as a building block for SIP client software foruses such as VoIP, IM, and many other real-time and person-to-person communication services.

SpanDSP is a library of DSP functions for telephony, in the 8000 sample per second world of E1s, T1s, and higher order PCM channels. It contains low level functions, such as basic filters. It also contains higher level functions, such as cadenced supervisory tone detection, and a complete software FAX machine.

LibiLBC is a packaging friendly copy of the iLBC codec from the WebRTC project. It provides a base for distribution packages and can be used as drop-in replacement for the non-free code from RFC 3591.

GNU Common C++ is an portable, optimized class framework for threaded applications, supporting concurrent synchronization, inter-process communications via sockets, and various methods for data handling, such as serialization and XML parsing. It includes the uCommon C++ library, a smaller reimplementation.

This package provides callaudiod, a daemon to route audio during phone calls, and a library.

Phonesim is a modem emulator that oFono uses for development and testing. This allows oFono to be used by any host without requiring special GSM (or other) hardware.

A collection of libraries and header files for implementing telephony functionality into custom Telegram clients.

Libre is a portable and generic library for real-time communications with async IO support and a complete SIP stack with support for protocols such as SDP, RTP/RTCP, STUN/TURN/ICE, BFCP, HTTP and DNS.

GNU SIP Witch is a peer-to-peer Voice-over-IP server that uses the SIP protocol. Calls can be made from behind NAT firewalls and without the need for a service provider. Its peer-to-peer design ensures that there is no central point for media intercept or capture and thus it can be used to construct a secure telephone system that operates over the public internet.

SIPp can be used to test many real SIP equipements like SIP proxies, B2BUAs, SIP media servers, SIP/x gateways, and SIP PBXes. It is also very useful to emulate thousands of user agents calling your SIP system.

EXosip is a library that hides the complexity of using the SIP protocol for multimedia session establishment. This protocol is mainly to be used by VoIP telephony applications (endpoints or conference server) but might be also useful for any application that wish to establish sessions like multiplayer games.

Baresip is a portable and modular SIP user agent with support for audio and video, and many IETF standards such as SIP, SDP, RTP/RTCP, STUN, TURN, ICE, and WebRTC.

GNU uCommon C++ is meant as a very light-weight C++ library to facilitate using C++ design patterns even for very deeply embedded applications, such as for systems using uclibc along with posix threading support.

Twinkle is a softphone for your voice over IP and instant messaging communcations using the SIP protocol. You can use it for direct IP phone to IP phone communication or in a network using a SIP proxy to route your calls and messages.

xgoldmon is an utility that converts the USB logging mode messages that various Intel/Infineon XGold modems send to the USB port to gsmtap. It then then sends them to a given IP address to enable users to view cellular network protocol traces in Wireshark.

It supports the following smartphones:

• Samsung Galaxy S4, GT-I9500 variant

• Samsung Galaxy SIII, GT-I9300 variant

• Samsung Galaxy Nexus, GT-I9250 variant

• Samsung Galaxy SII, GT-I9100 variant

• Samsung Galaxy Note II, GT-N7100 variant

TSM is a state machine for DEC VT100-VT520 compatible terminal emulators. It tries to support all common standards while keeping compatibility to existing emulators like xterm, gnome-terminal, konsole, etc.

Termite is a minimal terminal emulator, with a slightly modified version of VTE exposing the necessary functions for keyboard text selection and URL hints. It was designed for use with tiling window managers.

beep allows the user to control the PC speaker with precision, allowing different sounds to indicate different events. While it can be run quite happily on the command line, its intended place of residence is within scripts, notifying the user when something interesting occurs. Of course, it has no notion of what's interesting, but it's very good at that notifying part.

This package provides a thin wrapper for fzf.

FbTerm is a fast terminal emulator for Linux with frame buffer device or VESA video card. Features include:

• mostly as fast as terminal of Linux kernel while accelerated scrolling is enabled;

• select font with fontconfig and draw text with freetype2, same as Qt/Gtk+ based GUI apps;

• dynamically create/destroy up to 10 windows initially running default shell;

• record scrollback history for every window;

• auto-detect current locale and convert text encoding, support double width scripts like Chinese, Japanese etc;

• switch between configurable additional text encodings with hot keys on the fly;

• copy/paste selected text between windows with mouse when gpm server is running;

• change the orientation of screen display, a.k.a. screen rotation;

• lightweight input method framework with client-server architecture;

• background image for eye candy.