PICSimLab is a realtime emulator for PIC, Arduino, STM32, ESP32, ...
DNP3 Source code Library for Windows and simulator
DNP3 Protocol Source code Library for Linux x86 x64 ARM PowerPC
Mixed Integer Linear Programming (MILP) solver.
Linux for Arduino and Makers developers
Windows binaries for the GNU Linear Programming Kit (GLPK)
Electronic design and programming tools suite like Eagle, MpLab
Command Centre
Win32 OpenGL Extension API