wspacegen is an interactive IDE for programing with whitespace (http://compsoc.dur.ac.uk/whitespace/). So it's possible to create .ws code relative easily and debug it as well. But attention, you'll addicted to it (-:
Synthesis is a RAD tool and C++ IDE (like VB or BCB). It eases the creation of Win32 programing though visual programming and class wizards. Using opensource framework and minGW Synthesis provides a extendable and powerful development environment.