I know LTSpice seems to do a good job at analog simulation. I am curious what other software is out there on the market (free or not) for simulations and what peoples opinions on other options? I tried to install something called Qucs. But it requires for digital simulation a C++ compiler and some other software called FreeHDL. What I liked about Qucs: It was suppose to support not just digital simulation but also VHDL and Verilog files. But I could never get the digital simulation working on Windows something about the dependencies on those other two items. I installed the two 'dependencies' but that did not resolve the issue.