SpeechLion is a speech recognition application for desktop command and control. It is based on the Sphinx-4 recognizer, and it allows the user to control the Linux desktop using simple spoken commands. Some example commands are "browse google", "mouse click", "next window", "show help", and "volume mute". SpeechLion recognizes high-level commands for Web browsing via Firefox, simple Emacs usage, window control, volume control, and more. It also has low-level commands for ad-hoc keyboard shortcuts and mouse actions.