Deskflow is a free and open-source keyboard and mouse sharing utility (software KVM without video) that allows one computer's keyboard, mouse, and trackpad to control multiple computers over a network. It uses a client-server architecture with a core process handling input forwarding and network protocol, a daemon for Windows service/UAC support, and a Qt-based GUI for configuration. The system supports TLS encryption, clipboard sharing, and multiple platforms including Windows, macOS, Linux (X11 and Wayland). It implements a custom binary protocol with version negotiation (1.0-1.8) and provides platform-specific backends for input capture and injection. The codebase is well-structured with clean abstractions, extensive unit tests, and CI/CD pipelines, though it carries some legacy code from its Synergy/Barrier origins.