[ update 12 July 2011: The creator of Weird Metronome recently informed me that the application has been updated to correct the timing problems and include hotkeys, which negates my original complaints about Weird Metronome (when compared to Zetronome). It also works on Windows mobile devices now (if you are into that kind of thing). The creator of Weird Metronome has also released an open source guitar tuner (which I have not tried) if you want to check that out! ]
If you’re looking for a free metronome to use on your PC, you might want to try Weird Metronome. It’s tiny, eminently configurable, and FREE.
I’ve been using it on my PC for a couple of weeks now, and the only feature this metronome is lacking is keyboard shortcuts for adjusting the tempo. However, the author makes the source code available, so if you’re good at C++ you could try adding this feature (and get my eternal gratitude).
Advantages of a PC-based metronome
I love my little Korg metronome, but sometimes it’s nice to be able to practice without worrying about annoying others with the click, click, click. My Korg does have a headphone jack, but I’m too lazy to route the signal into my mixer so I can hear both the metronome and my guitar.
If you play your guitar through your PC, then using Weird Metronome makes it easy to get a good guitar-metronome headphone mix.
[UPDATE 2 September 2007: Some users may experience timing issues with Weird Metronome (I've not noticed this problem, but maybe my timing just sucks! Another free alternative that seems really great is Zetronome, which was pointed out by Mamadalica in comments. It can be controlled with keyboard shortcuts, is highly configurable, and uses real drum sounds. Oh, and for your speed demons, it goes up to 300 bpm. My spontaneous impression is that it kicks Weird Metronome's butt.
A non-free alternative is Beatcraft (thanks to Seb for the tip).
Blogging is cool. Not only do I get to share things that I discover, but I learn a lot from you alert readers as well! ]