Circuit simulator and PCB design software - EasyEDA
EasyEDA is a free, no-install, cloud-based EDA tool, designed to give electrical engineers, educators, engineering students and electronics hobbyists an Easier EDA Experience. It is easy to use circuit design, circuit simulator and PCB design app that runs in your web browser.
Features of EasyEDA: Cool Schematic Capture - draw schematics quickly using the available libraries on browser. Seamless automatic upgrades; Circuit Simulator - verify analog, digital and mixed signal circuits with spice subcircuits and models; Online PCB Design - with multiple layers and thousands of different pads for smooth PCB layout.
The system is very stable, reliable and easy to learn. The user-interface is very pleasant and responsive. EasyEDA has a rich library of thousands of electronic components (for both circuits and printed circuit boards, and also for modeling), and tens of thousands of examples of schematics! Anyone can use this library and expand it. It can also import existing designs done in Altium, Eagle and KiCad and then edit them using the online editor.
Moreover, another outstanding feature of EasyEDA is that users have access to Open Source modules developed by thousands of electronics engineers.
The following video briefly presents the features of EasyEDA tool:
[ Source: EasyEDA ]