Callisto has announced the release of PhotoParade 4.0, the latest version of the company’s software that gives users “a simple, exciting way to turn digital photos into entertaining slideshows and screen savers to share with family and friends.” PhotoParade 4.0 includes new themes, customizable themes, spell check, an improved address book and more. PhotoParade 4.0 only runs on Mac OS 8.6 or later, and is priced at US$19.99.