Drakon provides a graphical display of the running processes and lets you pause or terminate them.
ChangeLog: http://drakon.sourceforge.net/ChangeLog.html
A free cross-platform editor for the DRAKON visual language.
DRAKON serves them to explain the dynamics of a software system.
Software engineers can use DRAKON Editor to build algorithms in Go, Java, Processing.org, D, C#, C, C++, Python, Tcl, Javascript, Erlang and Lua.