MacThemes.net writes "MacThemes.net has had over 45 artists submit entries to our Theme Mockup Contest, of which the top six will be created into actual themes by established themers. Prizes of over a thousand dollars of software and cash will be awarded. Until this Sunday, readers and visitors are asked to visit our entries archive and vote for the submissions. Winners are expected to be announced Monday, April 5th." blobbo writes "iDevGames announces the opening of '21 Days Later', a programming mini-contest that is designed to motivate and educate Mac game developers. It is open to developers from around the globe, and the source code from all entries will be released as open source."