Open Source C Terminal Emulators

tn5250 emulates a 5250 terminal or printer over telnet, for connecting to IBM Power Systems, iSeries and AS/400 computers running IBM i, i5/OS and OS/400. It runs on any Unix or Windows system. Note that this project is now on GitHub at https://github.com/tn5250/tn5250

Project has been moved to https://github.com/marchaesen/vcxsrv Windows X-server based on the xorg git sources (like xming or cygwin's xwin), but compiled with Visual C++ 2012 Express Edition. Source code can also be compiled with VS2008, VS2008 Express Edition and VS2010 Express Edition, although current project and makefile are not fully compatible anymore. Versions starting from 1.14.3.0 are not compatible with Windows XP anymore.

Xming is the leading X Window System Server for Microsoft Windows 8/7/Vista/XP (+ server 2012/2008/2003). It is fully featured, small and fast, simple to install and because it is standalone native Microsoft Windows, easily made portable (not needing a machine-specific installation).

TeraTerm Project is developing the terminal emulator Tera Term and the SSH compatible extension module TTSSH. This is open source software under the BSD license. This is the official successor to the original Tera Term Pro 2.3. Development takes place on the project page on GitHub.

ExtraPuTTY - fork of putty 0.67. (Add win32 API,shortcuts for pre-defined command,can use files instead of the registry,auto-reconnect, scripting a session with lua,integrates FTP,TFTP,Ymodem,Xmodem transfert protocols, integrates cygwin, zmodem, session manager,hyper link projects and others ...)

mintty is a native Windows terminal emulator used as the Cygwin Terminal and commonly used with MSYS2, Git Bash, and WSL-related workflows. It provides an xterm-compatible terminal experience without requiring an X server. The project emphasizes a clean Windows interface, Unicode support, reliable terminal emulation, and practical configurability. It is popular among developers who need a Unix-like terminal environment on Windows while still using a lightweight native application. mintty supports theming, keyboard and mouse behavior customization, terminal control sequences, and integration with shell environments. Its main value is delivering a mature and minimal terminal emulator for Windows-based Unix toolchains.

This project maintains the Linux Console tools, which include utilities to test and configure joysticks, connect legacy devices to the kernel's input subsystem (providing support for serial mice, touchscreens etc.), and test the input event layer.

SSVNC adds encryption security to VNC. It provides a GUI for Windows, MacOSX, and Unix that automatically starts up an SSL or SSH tunnel for connections to any VNC server. It also supports VeNCrypt encryption. The Unix viewer has many new features.

Arabeyes is a Meta project that is aimed at fully supporting the Arabic language in the Unix/Linux environment. It is designed to be a central location to standardize the Arabization process. Arabeyes relies on voluntary contributions.

mlterm is a multi-lingual terminal emulator , which supports various character sets and encodings in the world.

PuTTY SSH client for Symbian OS

Qodem is a a terminal emulator that resembles the BBS-era Qmodem. Includes phonebook, scrollback, capture, X/Y/Zmodem, Kermit, ANSI (+ music) / Avatar / VT102 / Linux emulation, Unicode, and keyboard macros. Connects over serial, ssh, telnet, rlogin.

rxvt is a colour vt102 terminal emulator intended as an xterm(1) replacement for users who do not require features such as Tektronix 4014 emulation and toolkit-style configurability. The rxvt terminal is light on system resources and otherwise packe dwit

Linux is an excellent environment for deploying diskless thin clients. Whether you are installing a 2nd workstation at home, 50 workstations in a CyberCafe or 500 workstations in a major university or corporation, the LTSP can help you be successful.

LibVNCServer/LibVNCClient are cross-platform C libraries that allow you to easily implement VNC server or client functionality in your program.

Mrxvt is a multi-tabbed X terminal emulator based on rxvt. It is portable, lightweight and fast. It supports psuedo-transparency, background image (JPEG/PNG/XPM), tinting, NeXT/Rxvt/Xterm/SGI style scrollbar, multi-languages (CJK), XIM, freetype font...

dtelnet: A Free Telnet Client for Windows 16/32/64 Emulates many terminal types 'linux,xterm,rxvt,konsole,vt100,vt320,vt420' (xterm[-256color] is the preferred), talks protocols 'telnet' and 'login'. Many customization options available.

GTKTerm is a small graphical shell like XTerm. It provides serveral terminals in one window and some nice features. It´s available for GTK 2.x.

Tilda is a Linux terminal taking after the likeness of many classic terminals from first person shooter games, Quake, Doom and Half-Life to name a few, where the terminal has no border and is hidden from the desktop till a key or keys are pressed.

Eterm is a color vt102 terminal emulator intended as an xterm replacement. It is designed with a Freedom of Choice philosophy, leaving as much power, flexibility, and freedom as possible in the hands of the user.

xrootconsole tails a file in a window on your X11 root window. It aims to be as simple and resource-light as possible, within reason: it should run smootlhy on a P133 laptop. The program is non-interactive; all configuration is done on the command line.

ROTE is a simple C library for VT102 terminal emulation. It allows the programmer to set up virtual 'screens' and send them data. They will emulate the behavior of a VT102 terminal, interpreting escape sequences, control characters and such.

Etherboot is Open Source code for creating boot ROMs for network booting x86, AMD64, Itanium, Hammer, Hyperstone and ARM (noMMU) platforms.

ThinTUX is a small Linux distribution for thin clients. It has support for all major remote access protocols. The distribution can be booted from the network. The configuration is stored on a DHCP server to simplify terminal management.

LCXterm is a ncurses-based terminal emulator that brings additional conveniences to the raw Linux console and other terminals. LCXterm can: enable GPM mouse to work through a network connection; speed up the console significantly; provide a long and persistent scrollback; transfer files via Xmodem, Ymodem, Zmodem, and Kermit; provide user-defined function key macros; and many more.