Microcap demo má 3,7MB a tato omezení:

The demo is limited as follows: circuit size limited to 50 components (all layers), anywhere from 0 to 300% slower than the professional, limited component library, no Model program, and some of the advanced features are not available.

http://www.spectrum-soft.com/demoform.shtm
Používali jsme to ve škole (VUT Brno) a fachčí to slušně.