DoCircuits offers a variety of components and tools for browser-based schematic capture and simulation. After building a circuit, the designer can drive the circuit and measure response using a set of "virtual lab tools" including a DC source, function generator and oscilloscope. The tool offers circuit simulations with time- and frequency-domain analysis.
iSchematics' Spicy Schematics offers a full slate of circuit primitives for designing circuits. After completing a circuit, the designer can export a netlist as well as use the tool's internal Spice simulator to perform DC and AC sweeps as well as transient analysis. The tool offers a Spice model manager, which allows the user to view and modify existing models or create a new one on the fly.