Currently my windows based tablet pc is non operational – waiting for a maintenance window to get it repaired. Some of the applications that showed the tablet to greatest advantage were based on direct manipulation – for example art related and creative tools which harness the touch and pen interfaces,
So I was quite pleased to see that Artrage had been ported to Iphone and Ipad. You can get it here. Its a drawing application that – in the hands of a real artist – really shows off the touch interface. I have to say that the application has even improved and this was evident through the response of young ipad users who were able to start using the application with the minimum of tuition. Its not a free application but well worth the low cost.