QElectroTech - QElectroTech is a free software to create electric diagrams.
Coil32 - Coil32 is one of the best apps featured with an inductance coil calculator to calculate chokes, flat square coils, and single/multi-layer air-core inductors on printed circuit boards.
Electronics Calculator - Electronics Calculator is one of the best mobile apps that consist of various electronic conversions, references, calculators, and tables.
Virtuino Modbus - Virtuino Modbus is an app that enables you to monitor or control the automation system by using IP protocol or Modbus TCI.
EPLAN Electric P8 - CAE software solution for project planning, documentation and administration of electrotechnical automation projects.
Electronics Assistant - Electronics Assistant is a Windows program that performs electronics-related calculations.