Tappx

Tappx is an online community that enables developers to promote their app for free by exchanging ads with other developers. For each ad that a member shows, the user earns a credit (Tappx), and each time another member shows one of his ads, he is charged a credit.

Tappx is a cross-promotion community, made by developers for developers. It is designed to give mobile app developers a free platform to increase the popularity of their app during the launch in the app market. The website currently hosts a wide collection of apps developed by users from around the world.