Composable transformations of Python+NumPy programs
Orange: Interactive data analysis
2D & 3D TeX-Aware Vector Graphics Language
Model Railway CAD program
JaxoDraw: Feynman Diagrams made easy!
Toolkit for working with and mapping geospatial data
PICSimLab is a realtime emulator for PIC, Arduino, STM32, ESP32, ...
ESP32 mySQM+ Sky-Meter/Weather Station with loads of features
The Great Periodic Path Hunt at gwtokarsky.github.io
MiRDeep*
Ladder editor and debugger
Python script for calculation of deflection of elastic ropes.
Graphic interface with algorithms to compute line and root graphs
2D CAD software
Manual counter with the keyboard or the mouse on images
Growth-grammar related Interactive Modelling Platform
PeCalc is a polyvalent engineering calculator for S&T students
OpenNum lets you distribute solvers with a nice graphical interface