Foldit is described as 'Experimental video game about protein folding, developed as a collaboration between the University of Washington's departments of Computer Science and Engineering and Biochemistry (many of the same people who created Rosetta@home)' and is an app in the education & reference category. There are more than 10 alternatives to Foldit for a variety of platforms, including Web-based, Windows, Mac, Linux and Self-Hosted apps. The best Foldit alternative is Folding@home, which is free. Other great apps like Foldit are Charity Engine, GridRepublic, Distributed Proofreaders and Biogenesis.