Drone refers us to this browser-based online schematic capture, SPICE simulator, and waveform viewer:
PartSim is a full-featured circuit simulator that allows anyone to create, simulate and share electronic circuits using their web browser,” said Cody Miller, Aspen Labs president and CEO. “Web-based tools offer huge productivity boosts. There are no install processes, application updates are automatic, and projects are easily shared using web links. We’ve partnered with Digi-Key Corporation to offer this tool free of charge and look forward to building a community of users.