Last time I wrote about Crayon Physics. This time I found in the irrlicht blog another interesting Software which plays with physics and let you draw and move objects.
Phun was created as a master of science thesis and is indented to explore and play with physical objects. On the webpage of phun by Emil Ernerfeldt you can find more detailed information, screenshots, video and downloads for for windows and linux systems. Mac version is coming soon.
You can do more than draw only simple objects and let them fall or rotate on a fix point. There are more complex objects like chains and rotating wheels. With a bit patient and time you can build even virtual machines 🙂