EasyEDA - EasyEDA - Web-based EDA suite; runs in browser.
RT-LAB - OPAL-RT’s mission is to provide cutting-edge real-time simulation technology to engineers and researchers around the world.
LTspice - LTspice® is a high performance SPICE simulation software, schematic capture and waveform viewer with enhancements and models for easing the simulation of analog circuits.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
TINACloud - Create Simulate and Design Circuits and their PCB layout with TINACloud
SIMUL8 - Simulation is an effective system that permits you to make striking, certain choices since it gives you the confirmation to make certain you are settling on the right decision.