The beauty of Dribbble (in my opinion) and the reason it works well is because designers don't show off entire projects - it's a just little bit of what they're working on that's delightful to see and quite inspiring.

The same could work for software on the front-end certainly (sort of like codepen.io or jsfiddle), but I'm less sure it'd work for the code behind entire projects - there's not much 'quick hit' inspiration looking through a repo.