Browse free open source C Terminals and projects below. Use the toggles on the left to filter open source C Terminals by OS, license, language, programming language, and project status.

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  • 1
    Null-modem emulator

    Null-modem emulator

    The virtual serial port driver for Windows.

    The Null-modem emulator (com0com) is a kernel-mode virtual serial port driver for Windows. You can create an unlimited number of virtual COM port pairs and use any pair to connect one COM port based application to another. The HUB for communications (hub4com) allows to receive data and signals from one COM or TCP port, modify and send it to a number of other COM or TCP ports and vice versa.
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    4.4 out of 5 stars 64 Reviews
    Downloads: 7,018 This Week
    Last Update:
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  • 2
    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.
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    4.9 out of 5 stars 71 Reviews
    Downloads: 2,456 This Week
    Last Update:
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  • 3
    This project provides a proxy that allows telnet/tcp connections to be made to serial ports on a machine.
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    4.9 out of 5 stars 16 Reviews
    Downloads: 1,891 This Week
    Last Update:
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  • 4
    WindTerm

    WindTerm

    A professional cross-platform SSH/Sftp/Shell/Telnet/Serial terminal

    A Quicker and better SSH/Telnet/Serial/Shell/Sftp client for DevOps. WindTerm is a partial open source project, and the source will be gradually opened. Open source code includes, but is not limited to, the classes that can be used independently, such as functional, algorithms, GUI widgets, etc., as well as functional libraries, such as networks, protocols, etc., as well as all types that require open source according to the license. SSH v2, Telnet, Raw TCP, Serial, Shell protocols were implemented. Supports SSH auto-execution when the session is authenticated. Integrated local file manager, supports the move to, copy to, copy from, remove, rename, make new file/directory and so on. Supports Windows Cmd, PowerShell and Cmd, PowerShell as administrator. Supports Linux bash, zsh, PowerShell core, and so on. Supports MacOS bash, zsh, PowerShell core, and so on.
    Downloads: 168 This Week
    Last Update:
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  • 5
    AA means Ascii Art - the AAlib (ascii art GFX library), BB (audiovisual demonstration for your terminal), aview (image browser/animation player), AAvga (SVGAlib wrapper for AA-lib), ttyquake (text mode quake), aa3d (random dot stereogram generator)...
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    3.9 out of 5 stars 7 Reviews
    Downloads: 1,260 This Week
    Last Update:
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  • 6
    setserial is a program designed to set and/or report the configuration information associated with a serial port.
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    Downloads: 2,445 This Week
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  • 7

    SyncTERM

    Cross-platform BBS (ANSI) Terminal

    A cross-platform ANSI-BBS terminal designed to connect to remote BBSs via telnet, rlogin, or SSH. Supports ANSI music and the IBM charset when possible. Will run from a console, under X11 using XLib, or using SDL.
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    5.0 out of 5 stars 9 Reviews
    Downloads: 427 This Week
    Last Update:
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  • 8
    Xming X Server for Windows

    Xming X Server for Windows

    X Window System Server for Windows

    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).
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    Downloads: 1,842 This Week
    Last Update:
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  • 9

    empty

    Run applications under pseudo-terminal (PTY) sessions

    empty - run applications under pseudo-terminal (PTY) sessions to dialogue with interactive programs. Replace TCL/Expect with a simple tool and use your favorite shell (sh, bash, csh, tcsh, ksh, zsh, etc)
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    4.7 out of 5 stars 3 Reviews
    Downloads: 347 This Week
    Last Update:
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  • 10
    Tera Term
    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.
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    5.0 out of 5 stars 1 Review
    Downloads: 659 This Week
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  • 11
    Radare2

    Radare2

    UNIX-like reverse engineering framework and command-line toolset

    A free/libre toolchain for easing several low-level tasks like forensics, software reverse engineering, exploiting, and debugging. It is composed by a bunch of libraries (which are extended with plugins) and programs that can be automated with almost any programming language. It is recommended to install it from git, alternatively, you can pick the last release (every 6 weeks) from Github. Batch, Commandline, visual, and panels interactive modes. Embedded webserver with js scripting and WebUI. Assemble and disassemble a large list of CPUs. Runs on Windows and any other UNIX flavor out there. Analyze and emulate code with ESIL. Native debugger and GDB, WINDBG, QNX, and FRIDA. Navigate ASCII-art control flow graphs. Ability to patch binaries, and modify code or data. Search for patterns, magic headers, and function signatures. Easy to extend and modify. Commandline, C API, script with r2pipe in any language.
    Downloads: 33 This Week
    Last Update:
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  • 12
    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 ...)
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    5.0 out of 5 stars 2 Reviews
    Downloads: 230 This Week
    Last Update:
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  • 13
    tmux

    tmux

    tmux is a terminal multiplexer

    tmux is a terminal multiplexer: it enables a number of terminals to be created, accessed, and controlled from a single screen. tmux may be detached from a screen and continue running in the background, then later reattached. This release runs on OpenBSD, FreeBSD, NetBSD, Linux, OS X and Solaris. tmux depends on libevent 2.x, and on ncurses. To build tmux, a C compiler (for example gcc or clang), make, pkg-config and a suitable yacc (yacc or bison) are needed. Some platforms provide binary packages for tmux.
    Downloads: 23 This Week
    Last Update:
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  • 14
    KiTTY

    KiTTY

    Lightweight, open-source SSH/telnet client

    KiTTY is a lightweight, open-source SSH/telnet client and terminal emulator based on PuTTY, designed for use in Windows environments. It is primarily used for remote connections via SSH, Telnet, Rlogin, and serial protocols, making it an essential tool for system administrators, network engineers, and developers who need to manage remote servers or devices. KiTTY extends PuTTY's functionality with a variety of enhancements, such as session management, automated password handling, and portable executables, providing a more convenient and customizable experience. Its minimalistic design ensures fast performance, while its extended features cater to both basic and advanced users who require reliable, secure, and efficient remote access tools.
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    5.0 out of 5 stars 1 Review
    Downloads: 326 This Week
    Last Update:
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  • 15

    hwmonitor

    Show server load-average chart and run pre-define command remotely

    I'm a HW Support and used cacti, zabbix, but they are too "strong", sometimes I just want to know server "worked fine", and show me a basicly load-average chart, that's enough. And the other hand, I need run command (like: "top", "iostat", "date" etc.) remotely and show it out to the webpage. The hwmonitor(writen in C) is a simple daemon, you can define some command-name(like: show_top= top -b -n1), telnet to this daemon and input your def-command(like: show_top), hwmonitor will return the info. And hwclient(include in this project, writen in C) connect to hwmonitor, input a define command-name to get server load-average and IO-idle each 60 seconds(you can change it) into a text file. hwgraphic (include in this project, writen in PHP) read the text file(generated by hwclient) and show the load-average chart and IO-idle chart.
    Downloads: 572 This Week
    Last Update:
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  • 16
    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.
    4.6 out of 5 stars 26 Reviews
    Downloads: 85 This Week
    Last Update:
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  • 17

    tn5250

    5250 telnet client

    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
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    4.4 out of 5 stars 5 Reviews
    Downloads: 76 This Week
    Last Update:
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  • 18
    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.
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    Downloads: 325 This Week
    Last Update:
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  • 19
    Mintty

    Mintty

    Terminal emulator for Cygwin, MSYS, and WSL

    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.
    Downloads: 11 This Week
    Last Update:
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  • 20
    HSTR

    HSTR

    bash and zsh shell history suggest box

    Easily view, navigate and search your command history with shell history suggest box for bash and zsh. Are you looking for a command that you used recently? Do you want to avoid the need to write long commands over and over again? Are you looking for a tool that is able to manage your favorite commands? HSTR (HiSToRy) is a command-line utility that brings improved bash/zsh command completion from history. It aims to make completion easier and more efficient than Ctrl-r. HSTR can also manage your command history (for instance you can remove commands that are obsolete or contain a piece of sensitive information) or bookmark your favorite commands.
    Downloads: 10 This Week
    Last Update:
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  • 21

    Arabeyes

    A project to increase free Arabic fonts on Unix/Linux

    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.
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    5.0 out of 5 stars 1 Review
    Downloads: 143 This Week
    Last Update:
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  • 22
    mcrcon

    mcrcon

    Console based rcon client for minecraft servers.

    Mcrcon is IPv6 compliant minecraft rcon client with bukkit coloring support. It is well suited for remote administration and to be used as part of automated server maintenance scripts. - Does not trigger "IO: Broken pipe" or "IO: Connection reset" spam bug on server side. - Has workaround for server side bug (https://bugs.mojang.com/browse/MC-154617) ****************************************************************** Further development and new releases has moved to Github Github page: https://github.com/Tiiffi/mcrcon Official upstream: https://github.com/Tiiffi/mcrcon/releases https://api.github.com/repos/tiiffi/mcrcon/releases/latest ******************************************************************
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    5.0 out of 5 stars 3 Reviews
    Downloads: 59 This Week
    Last Update:
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  • 23
    KiTTY++

    KiTTY++

    security and feature upgraded KiTTY windows ssh-client

    KiTTY++ is an even more feature-rich Windows SSH/Telnet/WSL client. This branch is a forward-port of old KiTTY features and a lot more onto a current PuTTY — you get old and new extras on top of a modern, security-patched core. FIDO security keys are supported by the SSH-Agent and our full suite of applications. OpenSSH's session-bind and destination restrictions are also supported by our full suite of applications. in case you are wondering why your KiTTY++ terminal window is colored red-ish or yellow-ish: OSC 3008 context information is sent by systemd and as default this is per session enabled, please disable it if you don't want this color information as a system warning "you are root" or "you are another user".
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    5.0 out of 5 stars 1 Review
    Downloads: 103 This Week
    Last Update:
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  • 24
    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
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    5.0 out of 5 stars 4 Reviews
    Downloads: 37 This Week
    Last Update:
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  • 25
    mlterm is a multi-lingual terminal emulator , which supports various character sets and encodings in the world.
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    5.0 out of 5 stars 3 Reviews
    Downloads: 37 This Week
    Last Update:
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