Blockly - Blockly features if/then logic in jigsaw-shaped pieces containing commands that you snap together to create an application.
Cargo-Bot - Cargo-Bot is a puzzle game where you teach a robot how to move crates. Free iPad app in the App Store.
Code Monster - Short lessons take kids from basic actions like resizing objects to complex animation.
Hopscotch - Coding for kids on an iPad. Free iPad app.
MIT App Inventor - Make your own Android app with a drag-and-drop interface. Free Google account required.
Science 360 - Science 360 is a free, high-quality science and engineering news and information app published by the National Science Foundation.
Scratch - Use Scratch to create stories, games, and animations. Free sign up required.