Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Flare by GoDaddy - Discover, give feedback and support startup ideas
Xamarin.Android - Integrated environment for building not only native Android but iOS and Windows apps too.
Little Inventors - Turn children's ideas into reality
Kodular - Much more than a modern app creator without coding
Generating Product Ideas - Find ideas for your next business or side project