Fliptrack, a privately held company in Mountain View, California, today launched a free online service for creating photo-music mash-ups. Users can upload photos and place them into a visual timeline. Even better, the application automatically synchronizes them to the beat or lyrics. Once complete, Fliptrack converts the creation into a flash-video for viewing as a musical photo montage or slide show.

Fliptrack has licensed more than 100 songs, which are free to use without copyright concerns, and will continue to build out its library of music, quick-start templates and photographs in the months ahead.

For a sample, see “Rummy is Out.”