Salut is a small program that performs calculations on simple networks around two-port devices (like transistors) characterized by s-parameters, at radio frequencies (RF). It has the ability to model components in series with a two-port block, like an inductance from the common lead to ground. Salut is also not restricted to the usual common emitter or common source configuration even though many semiconductor manufacturers only provide s-parameters for this case.
Transcalc is an analysis and synthesis tool for calculating the electrical and physical properties of different kinds of RF and microwave transmission lines. It uses GTK+ for its user interface. For each type of transmission line, it presents you with dialog boxes which allow you to enter values for the various parameters, and either calculate its electrical properties (analyze) or use the given electrical requirements to sythesize physical parameters of the required transmission line.
The Distributed Real-time Embedded Analysis Method (DREAM) is a tool and method for the real-time verification and performance estimation of distributed real-time embedded (DRE) systems. It focuses on the practical application of formal verification and timing analysis to real-time middleware.
LinkCAD is an all-in-one converter for AutoCAD DXF, Gerber RS274X, Calma GDS-II, CIF, PostScript, IE3D, TLC, and more. LinkCAD allows you to convert your mask or PCB layout between all the supported formats. Typical users are layout designers in the electronics industry, and mask designers for micro-technology applications.
YaPIDE aims to be a fully featured Microchip PIC simulator for Linux (and probably other Unixes). It is a GUI that provides a viewer for RAM, ROM, stack, breakpoints, and watchpoints, and has a source editor with inline debugging (ASM). The chip currently supported is the 16F628 (partial).