GMetronome is a free/libre software metronome for GNU/Linux and other Unix-like operating systems.

Features:
<ul><li>Tempo range from 30 to 250 BPM</li><li>Customizable accent patterns with three levels of accentuation</li><li>Divisible beats for simple and compound meters</li><li>Predefined patterns for widely used meters and time signatures</li><li>Training function (automatically increase or decrease tempo)</li><li>Profile support (save/restore settings)</li><li>Built-in synthesizer to customize click sounds</li><li>Customizable keyboard shortcuts</li></ul>