CCleaner (formerly Crap Cleaner) is a freeware utility program used to optimize a user's computer performance and clean its registry. It was developed by Piriform and is designed for Microsoft Windows. CCleaner is freeware, though Piriform accepts donations through its website to develop the company's programs further. CCleaner is available in 35 different languages, with more to be added. Piriform claims CCleaner has had over 275 million downloads on the homepage as of 1 May 2009.