DNP3 Source code Library for Windows and simulator
IEC 60870-5-101 Source code Library Stack - Windows c, c++, c# .net
Scientific/engineering firmware repurposing HP business calculators!
Schematic circuit editor for VLSI and Mixed mode circuit simulation.
IEC 101 Embedded Linux ARM, POSIX x86 x86-64 - c, c++ programming
IEC 104 Source code Library for Linux c c++ posix arm
DNP3 Protocol Source code Library for Linux x86 x64 ARM PowerPC
A scientific plotting library for C/Fortran built on cairo
A canvas library for generating technical drawings
Free Video Projector/Monitor Calibration Software
Electronic design and programming tools suite like Eagle, MpLab