Pocket Salsa / Salsa Video is an app that teaches you Salsa dancing. Think of it as App front-end to the website Addicted2Salsa, a website all about Salsa dancing. The Website Has over 100 short video lessons on Salsa Dancing, and the paid app lets you access them all, plus video-cast episodes.
While you *can* just watch the lessons on the website, you don't always have the computer with you, and this lets you take the lessons with you, even download for offline play.
Salsa Video / Free
Pocket Salsa / $1.99