DRAKON Editor [Russian] free tool to author
DRAKON flowcharts.  Supports seq.  diagrams,
class diagrams.  Draw diagrams for:
requirements & specs; document software
systems; business processes; procedures &
rules; More...  Src can be generated in
several languages, including Java,
Processing.org, D, C#, C/C++ (w/Qt support),
Python, Tcl, Javascript, Lua &Erlang. 
http://drakon-editor.sourceforge.net/
