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TkTimer is a Tcl/Tk program for recording elapsed time (especially worktime) for several tasks (userdefined). Reports show you a summarization of your tasks.
ProcessViewBrowser & ProcessViewServer represent an OpenSource attempt to industrial process visualization. It is based on Qt and is very portable. (Now also available as commercial software)
Designed especially for restaurants. Focus on using cheap standard PC components, aside from POS printer. Multiple waiters/bills/screens at the same time possible. GUI design tested/optimized on real waiters (at a restaurant in Harz Mountains / Germany).
tkCybernetics is a small grafical tool for rapidly setting up simulations of simple cybernetic systems. It was designed for didactic purpose but might be useful for the quick test of some circuit too.