Superpowers is an HTML5 development environment for making 2D and 3D games. It can be extended with plugins and lets you collaborate in real-time.
Alice is software that was created at Carnegie Mellon University, and is designed to teach junior high school and high school students computer programming in a 3d environment. Create animations, interactive games, videos, and share them.
Code Studio is a site for teaching programming fundamentals using an engaging and hands-on Scratch-based interface. Students progress through the lessons and apply prior knowledge to new coding problems. Different types of lessons are available for all ages of students 4 and up.