I use MediaMonkey for finding and syncing lyrics, with a plugin called Lyricator. That plugin can access various sites for lyrics (some are very slow, some fast - depending on the calls they allow). I think both is available with the free version of MediaMonkey, though I have a license so I can build smart playlists to further simplify the process (e.g., songs without lyrics, last added on top), and because they deserve a living, too.
That, and the possibility to sync music to my iPhone, are the only two reasons I use MediaMonkey. JRiver beats MM in all other disciplines. Just saying