Check here (thanks Adrian), also take a look at VPL, a visual language used by Microsoft Robotics Studio, not exactly new but resembling to Windows Workflow ? Robotics Studio also seems to have a Visual Simulation Environment, that is, 3d simulations of the robots – wow!

But my favorite is Popfly Explorer.

And apparently I was remembering incorrectly that you can’t build commercial products using these Express editions, well, I was wrong:

7. Can I use Express Editions for commercial use?

Yes, there are no licensing restrictions for applications built using Visual Studio
Express Editions.