pdnmesh is an automatic, 2D Delaunay mesh generator, and a solver for finite element analysis. It is capable of producing PostScript output of the mesh and contours. It is possible to use DXF files as input after filtering. It requires GTK/GtkGLExt and Mesa/OpenGL or MFC (Win32), and is written in C.
ChipVault is a chip development program for organizing VHDL and Verilog designs. ChipVault displays designs hierarchically and provides for rapid design navigation and editor launching. ChipVault provides hooks for performing bottom-up tasks such as launching RTL compilers, synthesis, block generation and instantiation, and includes simple to use Revision Control and Issue Tracking systems to help facilitate large group design projects with multiple designers and hundreds of design files. ChipVault is written in Perl and is small, fast, and efficient.
JHDL is a set of FPGA CAD tools which allows the user to design the structure and layout of a circuit, debug the circuit in simulation, netlist, and interface with backend tools for synthesis, etc. It is an exploratory attempt to identify the key features and functionality of good FPGA tools.
Platform Independent Petri Net Editor (PIPE) creates and analyses Petri Nets quickly, efficiently, and effectively. A key design feature is the modular approach adopted for analysis, enabling new modules to be written easily and powerfully, using built-in data layer methods for standard calculations. Six analysis modules are provided, including Invariant Analysis, State-Space Analysis (deadlock, etc.), and Simulation Analysis and Classification. PIPE adheres to the XML Petri net standard (PNML). The file format for saving and loading Petri Nets is extensible through the use of XSLT, the default being PNML.
Taverna is a collection of workflow enactment and description components, including a high level language for workflows called Scufl (Simple Conceptual Unified Flow Language), a pure Java object model, parser to populate the model, and a set of views and controllers (including some Swing components to drop into your workflow-enabled applications). In order to actually run workflows you also need the myGrid workflow enactment engine.
Electronic Design Automation - Index is a system that can be used in the electronic world to keep track of your: Schematic, Printed Circuit Board, Front Plate, and Programmable Logic Unit numbers. This is very useful when you have drawn many electronic schematics and PCBs in an EDA program such as Eagle, gEDA, Protel, or Orcad. It's also useful if you've created a front plate layout in an image editor such as GIMP, Corel Draw, or Photoshop.
Electronic Engineering Tool is a Web-based tool that includes an electronic formula calculator and converter functions. It very useful when working with electronics, both for engineers and amateurs. For example, it includes converters for dBm-to-Watt and Fahrenheit-to-Celsius, and it can calculate Ohm's law, filters, thermal resistant C/W, SWR, coil inductance, capacitor capacity, and more.