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• CvsGraph
  CvsGraph is a utility for generation of graphical representation of a CVS/RCS repository. ...
  
• Umbrello
  Tool to draw diagrams of Object Orientated software in industry standard Unified Modelling Language. Imports C++ and exports various languages. ...
  
• Tulip
  Tulip is a software system dedicated to the visualization of huge graphs. It manages graphs with up to 500,000 elements (node and edges) on a personal computer (PIII 600, 256MB RAM). Its SuperGraph t...
  
• yplot
  yplot is an interface to the PLPlot plotting library written as an extension of yorick. This combination allows one to quickly and easily create high-quality scientific plots from data, even in large...
  
• Ptplot
  Ptplot is a set of Java classes that can be used as an applet or an application for graphing datasets. It reads PlotML, binary, or ASCII data, is autoranging, and automatically or manually labels axe...
  
• Plotter
  Plotter is a GTK+ mathematical graph plotting application. It is written entirely in Python using the PyGtk. ...
  
• rrd-snort
  rrd-snort is a script that creates a graph from alerts/events stored in a Snort database in order to see distribution of "top n" attack methods. ...
  
• KFlowChart
  KFlowChart is a very young project intended to be a generic diagram maker. With it you can draw any kind of diagrams. This great flexibility is given by it's widget editor, with which you can design...
  
• ibargraph
  ibargraph shows the current throughput on an ISDN line as an LED bargraph with LCDProc. ...
  
• cinclude2dot
  cinclude2dot generates a directed graph of the #include relationships within a C source tree. ...
  
• WilmaScope
  WilmaScope is a Java 3D application that creates real-time 3D animations of dynamic graph structures. ...
  
• sig2dot
  sig2dot.pl can be used to generate a graph of all of the signature relationships in a GPG/PGP keyring. ...
  
• aiSee
  aiSee reads a textual, easy-to-read, and easy-to-learn graph specification and automatically calculates a customizable graph layout. This layout is then displayed, and can be printed or interactively...
  
• IFSplot
  ifsplot is an IFS attractor (fractal) plotter. ...
  
• lignumCAD
  lignumCAD is a tool for designing furniture. ...
  
• EAGLE
  Layout editor for PCB manufacturing. Further details see at: http://www.eagle.com :o) ...
  
• VARKON
  VARKON can be used as a traditional CAD-system with drafting, modelling and visualization if you want to but the real power of VARKON is in parametric modelling and CAD applications development. VARK...
  
• gEDA
  gEDA(Electronic Design Automation tools) - these tools are used for electrical circuit design, schematic capture, simulation, prototyping, and production. ...
  
• QCad
  QCad is an application for computer aided drafting in two dimensions. With QCad you can create technical drawings such as plans for buildings, interiors or mechanical parts. The source code of QCad i...
  
• ELECTRIC
  A state-of-the-art computer-aided design system for VLSI circuit design. Electric designs MOS and bipolar integrated circuits, printed-circuit-boards, or any type of circuit you choose. It has many e...
  
• GCAD3D
  3D-CAD-CAM-software with integrated 3D-OpenGL-viewer ...
  
• Engy CAD
  cad tool. ...
  
• Pcb
  Pcb is a handy tool for the X Window System to design printed circuit boards. All coordinate units are 1/1000 inch. A layout consists of lines, arcs, polygons, elements (lines, pins and arcs), vias, ...
  
• Alliance
  Alliance is a complete set of free CAD tools and portable libraries for VLSI design. It includes a VHDL compiler and simulator, logic synthesis tools, and automatic place and route tools. A complete ...
  
• XCircuit
  Utility for design circuits. ...