PJProject provides an implementation of the Session Initiation Protocol (SIP) and a multimedia framework.

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

LibIAX2 implements the Inter-Asterisk-Protocol for relaying Voice-over-IP (VoIP) communications.

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).

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.

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.

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

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.

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.

Havoc is a minimal terminal emulator for Wayland.

Kitty is a fast and featureful GPU-based terminal emulator:

• Offloads rendering to the GPU for lower system load and buttery smooth scrolling. Uses threaded rendering to minimize input latency.

• Supports all modern terminal features: graphics (images), unicode, true-color, OpenType ligatures, mouse protocol, focus tracking, bracketed paste and several new terminal protocol extensions.

• Supports tiling multiple terminal windows side by side in different layouts without needing to use an extra program like tmux.

• Can be controlled from scripts or the shell prompt, even over SSH.

• Has a framework for Kittens, small terminal programs that can be used to extend kitty's functionality. For example, they are used for Unicode input, hints, and side-by-side diff.

• Supports startup sessions which allow you to specify the window/tab layout, working directories and programs to run on startup.

• Allows you to open the scrollback buffer in a separate window using arbitrary programs of your choice. This is useful for browsing the history comfortably in a pager or editor.

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.

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.

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

Agg is a command-line tool for generating animated GIF files from asciinema-created terminal session recordings.

mlterm is a multi-lingual terminal emulator. It supports various complex character sets and encodings from around the world. It can display double-width (e.g. East Asian) glyphs, combining characters used for, e.g., Thai and Vietnamese, and bi-directional scripts like Arabic and Hebrew.

Kmscon is a terminal emulator based on Linux's KMS. It can replace the in-kernel VT implementation with a user-space console. Compared to the Linux console, kmscon provides enhanced features including XKB-compatible internationalized keyboard support, UTF-8 input/font support, hardware-accelerated rendering, multi-seat support, a replacement for mingetty, and more.

Tilix is a tiling terminal emulator following the Gnome Human Interface Guidelines. Its features include:

1. Layout terminals in any fashion by splitting them horizontally or vertically.

2. Terminals can be re-arranged using drag and drop both within and between windows.

3. Terminals can be detached into a new window via drag and drop.

4. Input can be synchronized between terminals so commands typed in one terminal are replicated to the others.

5. Supports notifications when processes are completed out of view.

Xiate is a terminal emulator which tries to keep a balance between features and simplicity. This is achieved by using VTE as a powerful backend, while UI, configuration, and code try to remain much more minimalistic.

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.

tio is a simple TTY terminal application which features a straightforward commandline interface to easily connect to TTY devices for basic input/output.

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.

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

Eternal Terminal (ET) is a remote shell that automatically reconnects without interrupting the session. ET uses SSH to initialize a secure connection. Unlike SSH sessions, which must be killed and reconnected after a network outage an ET session will survive network outages and IP roaming. ET provides the same core functionality as mosh, while also supporting native scrolling and tmux control mode (tmux -CC).