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MSDViewer (My Schematic Drawer and Viewer) is a schema editor using a simple text file as input. Requires tcl/tk (>8.4) and Iwidgets (>4). should work on every platform supported by tcl/tk. Output postscripts.
A simple GUI for gnuplot in Tcl/Tk. The main goal of this project is to help novice/lazy users to use datafile oriented operations of 2D plotting. BETA version is available in "Download" section. Feel free to post Bug/Request/Patch in the Tracker. GNUP
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.