https://www.youtube.com/watch?v=0h6oXm2YXzg
DEFT linux, file search and recovery

PLC Library for Arduino (Programmable Logic Controller, German: SPS - Speicherprogrammierbare Steuerung)

ROOT data analysis framework (open source)

RStudio Numerical Matrix Calculation Suite, competitor to Matlab. Really powerfull, professional IDE with workspace-variables, debugging, package manager, open source

sandstorm.io

dar a powerfull backup tool, DarGUI is a comfortable user interface for dar!