The T3Marketplace will empower the whole TYPO3 Community with its easy and fast exchange of extensions and services, over a shop-platform. You have to build extension for your clients or you're in need of a responsive theme? Check the T3Marketplace and get what you need. And of course most of you already developed cool extensions and features which for some reasons you won't push into the repository. Now you can put them into the T3Marketplace and enrich the T3-Ecosystem a lot.