AppNext - AppNext offers mobile monetization and app distribution solutions.
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Liftoff.io - eCommerce & web to print platform
BuildFire - BuildFire is the easiest way for small businesses to build a mobile app in a matter of minutes for iOS and Android.
Localytics - App analytics and marketing for iPhone, iPad, Android, HTML5, Blackberry and Windows apps.
MIT App Inventor - App Inventor is a cloud-based tool, which means you can create apps for phones or tablets right in your web browser.