Retool - Build custom internal tools in minutes.
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
Internal.io - Build internal tools fast. Connect your databases, business apps, and REST APIs. Build any tool without engineering effort and free up valuable engineering time.
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
Amazon Honeycode - Use Amazon Honeycode to build custom apps that help your team manage work and achieve its goals. No programming required.
QUCS - Qucs, briefly for Quite Universal Circuit Simulator, is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit.