Covered - Verilog Code Coverage Analyzer
- A Verilog code coverage analysis tool that can be useful for determining how well a diagnostic test suite is covering the design under test.
Icarus Verilog
- A Verilog simulation and synthesis tool; it operates as a compiler, compiling source code written in Verilog (IEEE-1364) into some target format.
Open Collector
- Database of open hardware designs and design programs (especially the EDA end of hardware design).
The gEDA Project
- A GPL'd suite of tools used for electrical circuit design, schematic capture, simulation, prototyping, and production.