Octopart - A simple wrapper for the Octopart V3 API for Node. Contribute to octopart/octopart-node development by creating an account on GitHub.
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
Findchips - Findchips is a database for searching electronic parts and components and provide datasheet and bill of materials from multiple distributors and manufacturers.
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
Digchip - Digchip is an electronics database and documentation search engine that also acts as a 3rd party agent between distributors and buyers.
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.