RFSim99 - Linear circuit simulator featuring schematic capture, S parameter files, stability circles,
auto match, filter designer, attenuator designer and RF Calculator.

PCB123 - Free software for Schematic Diagrams and PCB design.

AntiVir - The AntiVir Personal Edition offers the effective protection against computer viruses
for the individual and private use on a single PC-workstation.

Jouni Vuorio - Author of several skilfully made programs for help to keep your system light and clear.

ExamDiff - Tool for visual file comparison. It has a number of simple and convenient features that
many users have been asking for a long time from a file comparison tool.

ZIPnAll - Total Archive utility and program files editor.