Scientific/engineering firmware repurposing HP business calculators!
Easy-to-use print report library and designer
Multifunctional electronics calculator
Best IDE for Beginners
jRCaLc is a program designed to aid you in working with resistors.
Resistor calculator and identifier
Just a basic 4 band resistor color calculator with chart.
The real open-source RTL-SDR 2832 dongle panoramic spectrum analyzer