rfMaxima is an RF toolbox for the wxMaxima computer algebra system.
The Sampa library is a comprehensive C++ library and lua toolset to simulate and analyze system on chip architectures through fast cycle accurate transactional level simulation. Tags: ESL, SoC, NoC, TLM, interconnect, IP, SystemC. More on sampalib.org
A package for transient and steady state simulation of organic solar cells.
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.
A program that analyzes info about an automotive engine, and wanted power increase in horsepower and the program helps give the user a possible turbocharger that satisfies the requirements.
vIDE is a cross-platform tool for writing and simulating Verilog models. It provides user friendly project management and file editing, integrated simulation engine, waveform viewer, pre-compiled modules, and many other cool features.
wxArt2D gives wxWindows applications sophisticated vector drawing functionality. It is based on a framework supporting multiple views within a hierarchical document. Supports drawing & (Graph) editing. In-output in SVG, GDSII, XML, easy to extend.
Educational software for designing and simulating logic circuits, with intuitive GUI, hierarchical circuits and multi bit buses, oscilloscope, and navigate running circuits hierarchy. Please visit project's web site at: http://www.LogicCircuit.org
Display gerber pcb (RS 273X format) files and drill files.
Gwave is a waveform viewer for the output of analog electronic circuit simulators such as spice. It displays the data as 2-D plots, and allows for interactive scrolling, zooming, and measuring of the waveforms.