Version: 1.4.2 (using KDE 3.5.2, Debian Package 4:3.5.2-2+b1 (testing/unstable)) Compiler: Target: i486-linux-gnu OS: Linux (i686) release 2.6.15-1-k7 Even if structrograms are not part of UML, I consider umbrella the closest tool that could render Nassi-Shneiderman diagrams from source code, because it already has algorithms of code parsing. So far, only kivio supports this kind of diagrams, but it cannot analyse code.