Open Source C++ Keyboards for Linux

A Vietnamese keyboard for Windows and Linux

Deskflow is a lightweight productivity tool designed to streamline window and workspace management. It features hotkey-driven app launching, workspace switching, window snapping, search快捷启动, and minimal UI. Built with modern frameworks (likely Electron or Qt) and geared toward power users wanting efficient workflow control.

Input‑Overlay is an open-source OBS Studio plugin for Windows and Linux that visualizes keyboard, mouse, and gamepad inputs on screen during livestreams or recordings. It presents inputs as overlay source with configurable presets.

This is the open source core component of Synergy, a keyboard and mouse sharing tool. Control your computers with one mouse and keyboard. Control multiple computers using only one keyboard and mouse. Focus on developing software, designing, gaming and remove time switching between operating systems. Throw away the extra keyboards and spend time where it really matters. Simplify your workspace by combining multiple computers into one. Easily copy and paste between computers with no effort at all. Keep your passwords and sensitive data secure with TLS encryption. Key, mouse and data all sent fast and securely, directly over your local network. Advanced customization settings give you complete control of your setup. The next version is being built from the ground up by combining the latest technologies, Node.js and React, with the rock-solid stability of C++.

Albert is a blazing-fast, plugin-based keyboard launcher written in C++/Qt.

Тapper — keyboard layout switcher for X Window System and Wayland. Tapper runs in background, when an assigned key is tapped, Tapper activates the corresponding keyboard layout. "Tap" means that a single key is pressed and quickly released, so (1) no other keys are pressed at this time, and (2) period between pressing and releasing is shorter than keyboard repeat delay (usually it is 0.5 s, but it depends on desktop settings). Tapper key feature is using modifier keys for switching keyboard layouts without losing modifier's functionality. Tapper works for GNOME, GNOME Classic, Cinnamon, i3, KDE, LXDE, LXQt, Mate, Ubuntu, Xfce desktops. There are prebult RPM packages for Fedora, Mageia, OpenMandriva, openSUSE, source tarball for configure && make is also available. Tapper is free software.

EDK has been developed to be a free keyboard layout configuration tool + GUI library. In order to be able to have english (latin), russian (cyrillic), chinese,etc keyboard layouts.It supplies Qt extended classes that support any unicode character.

FvwmKb is a module for Fvwm and Scwm window managers that makes it more comfortable to work with several Xkb keyboard layouts. For the focused window it stores the currently locked Xkb group (keyboard layout) in its internal database and restores it when

Hunixboard is a Desktop Keyboard with several funktions. Optimized for Touchscreen small size (Virtual keyboard for X11) ~ Switchable Board with 4 different boards ~ one board optimized for using with Instant Player ~ Resizebale ~ always on Top

KKBSwitch is a KDE panel applet which indicates the active keyboard layout (language). It is useful in conjunction with X Servers with the XKeyboard extension which have been configured to have more than one keyboard group

Youtube demonstration: http://youtu.be/SU5VvrWWf7s?hd=1

OpenMAIA. Free Virtual Keyboard Engine for disabled people. An Open Source project totally written in C++ with support of wxWindows library.

QVirtboard (Qt Virtual Keyboard) is a simple on-screen keyboard application, which extends its functionality in order to allow disabled people to control computer environment. This program can be used as a standard point-and-click virtual keyboard, as well as a more complex tool which can cooperate with web cameras or more sophisticated devices.

Q10 is the QT based application GUI for he popular x10 daemon heyu which controls home automation appliances. It was built with porting for embedded systems in mind and used in touch-screen displays as it also features a virtual on-screen keyboard.

Linux Console program that make a virtual keyborad that can be used with an absolute coordonates pointing device. It means that you can use your touchscreen to emulate a keyboard. It also does copy paste and stroke recognition.