I like JS Paint, because everyone is already familiar with the GUI and it should "just work" on any platform thanks to being a web app. The problem with JS Pai

I like JS Paint, because everyone is already familiar with the GUI and it should "just work" on any platform thanks to being a web app. The problem with JS Paint for me is that it doesn't run in my somewhat old version of Safari; I had to open Chrome/Firefox just to test it. For something to really be universal, it needs to work on every platform, including non-jailbroken old iPhones and Macs with their default browser (yes, I'm making an analogy between Safari and Internet Explorer).