One recent one is NoFlo http://noflojs.org/

A well established one for kids & novices is Scratch: http://scratch.mit.edu/

And you can see some other javascript-based visual programming tools here: https://github.com/jashkenas/coffee-script/wiki/List-of-lang...

20 years ago, during the peak of the CASE hype, there used to be several others.Borland ObjectVision, IBM VisualAge, Siemens EasyCase were some of them. Problem of all this tools is: It's proven that they don't scale. The sample programms that come with them all look nice and tidy, but god beware if you have to solve some real problem with real error handling. Right now Matlab Simulink&Stateflow (+some kind of code generator) is the only system usable for fingerpainting programms of significant size.