This project implements Catroid, an on-device visual programming language for Android devices that is inspired by the Scratch programming language developed by the Lifelong Kindergarten Group at the MIT Media Lab.

Paintroid is an associated graphical paint editor program for the Android platform that, among others, allows setting parts of pictures to transparent.

The Catroid community website features Catroid projects uploaded directly from Catroid. These projects can be downloaded and opened in Catroid, for execution on one's Android device and also for remixing. Further functionality such as commenting, forums, a wiki and many others are planned.

Please note that Catroid, Paintroid, as well as the Catroid community website are currently in pre-beta development stage (expect beta very soon). You are welcome to download and use them, including to upload your own projects to the community website. Please note that Catroid is under heavy development and that we may change anything until beta, including the project format. Please also note that we consider Catroid, Paintroid, as well as the Catroid community website not yet as ready for unsupervised usage by children and teenagers, though we work hard to get to that stage.

The video below is a teaser for the upcoming programming of Parrot's popular AR.Drone quadcopter using version 6 of Catroid via WLAN.

Here's a video of a Catroid project used to control a Lego Mindstorm Robot through Bluetooth:

And here's an older intro video for Catroid's release 4 version (now obsolete but still informative and a bit more general):

Resources:

• http://www.catroid.org/: Community website with sample programs
• Installation instructions
• Frequently asked questions
• Release history (including videos of older versions of the programs)
• Credits