It is a standalone, non-networked app that isn't very pretty to look at. But what if you want to share code and upload programs right from your browser? That's where CodeBender.cc comes in.

Above you can see [Hans’] creation next to the official Arduino USB-to-serial programmer. He used the same connection scheme, but went with an edge connector for the USB instead of using a mini ...

But that can be complicated, and usually requires a proper programmer. If you just want to watch to see what values are changing, and when functions are being executed, this isn’t a bad solution.