GNU ccRTP is an implementation of RTP, the real-time transport protocol from the IETF. It is suitable both for high capacity servers and personal client applications. It is flexible in its design, allowing it to function as a framework for the framework, rather than just being a packet-manipulation library.

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.

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.

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 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.

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.

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

Libosmocore includes several libraries:

• libosmocore: general-purpose functions

• libosmovty: interactive VTY command-line interface

• libosmogsm: definitions and helper code related to GSM protocols

• libosmoctrl: shared implementation of the Osmocom control interface

• libosmogb: implementation of the Gb interface with its NS/BSSGP protocols

• libosmocodec: implementation of GSM voice codecs

• libosmocoding: implementation of GSM 05.03 burst transcoding functions

• libosmosim: infrastructure to interface with SIM/UICC/USIM cards

Mumble is an low-latency, high quality voice chat software primarily intended for use while gaming. Mumble consists of two applications for separate usage: mumble for the client, and murmur for the server.

This package provides an implementation of the Secure Real-time Transport Protocol (SRTP), the Universal Security Transform (UST), and a supporting cryptographic kernel.

Twinkle is a softphone for your voice over IP and instant messaging communications 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.

This package provides multiplexer for the terminal focused on simplicity, compatibility, size and stability.

foot is a terminal emulator for systems using the Wayland display server. It is designed to be fast, lightweight, and independent of desktop environments. It can be used as a standalone terminal and also has a server/client mode.

WezTerm is a GPU-accelerated terminal emulator and multiplexer that features:

• Multiplex terminal panes, tabs and windows on local and remote hosts, with native mouse and scrollback.

• Ligatures, color emoji and font fallback, with true color and dynamic color schemes.

• Hyperlinks.

Tilda is a terminal emulator similar to normal terminals like gnome-terminal (GNOME) or Konsole (KDE), with the difference that it drops down from the edge of a screen when a certain configurable hotkey is pressed. This is similar to the built-in consoles in some applications. Tilda is highly configurable through a graphical wizard.

Cool-retro-term (crt) is a terminal emulator which mimics the look and feel of the old cathode ray tube (CRT) screens. It has been designed to be eye-candy, customizable, and reasonably lightweight.

Sakura is a terminal emulator based on GTK+ and VTE. It's a terminal emulator with few dependencies, so you don't need a full GNOME desktop installed to have a decent terminal emulator.

This package provides a thin wrapper for fzf.

Libtermkey handles all the necessary logic to recognise special keys, UTF-8 combining, and so on, with a simple interface.

This package provides a terminal emulator with hyperlink support. It's based on VTE and aimed at power users.

Picocom is a minimal dumb-terminal emulation program. It was designed to serve as a simple and manual modem configuration, testing, and debugging tool. It also serves well as a low-tech serial communications program to allow access to all types of devices that provide serial consoles.

Unibilium is a basic C terminfo library. It doesn't depend on curses or any other library. It also doesn't use global variables, so it should be thread-safe.

Libvterm is an abstract C99 library which implements a VT220 or xterm-like terminal emulator. It doesn't use any particular graphics toolkit or output system, instead it invokes callback function pointers that its embedding program should provide it to draw on its behalf. It avoids calling malloc during normal running state, allowing it to be used in embedded kernel situations.

Bootterm is a terminal designed to ease connection to ephemeral serial ports. It features automatic port detection, port enumeration, support for non-standard baud rates, the ability to wait for ports to appear, and the ability to read and write via stdin and stdout.