DCACLab is described as 'Electronic circuit simulator for STEM works online, Simulate and troubleshoot broken circuits in a rich simulation environment, easy to learn' and is a circuit simulator in the education & reference category. There are more than 10 alternatives to DCACLab, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux and iPhone apps. The best DCACLab alternative is Circuit JS, which is both free and Open Source. Other great sites and apps similar to DCACLab are QUCS, LTspice, Pspice and gEDA Project.