Prezzip is a website that allows users to download both free and priced templates for the use on the presentation site Prezi. The templates are downloaded in a SWF (Shockwave Flash) file and can then be uploaded to a users presentation on Prezi. You can currently search Prezzip for Prezis, Templates, Animations, and Pictures; so it is not limited to just templates. The prices for the purchasable templates and other features range from $1.99 to about $15.00. There is a Bundles option that allows users to save money by bundling various purchases together. If you are a big Prezi users, this website might come in handy. There are some very useful templates in the free section as well.
For more information, here is a very short video introducing Prezzip.