Electronic Schematics Free

Can anyone suggest a good free or reasonable electronic Circuit Schematic analyzing software?

For college class

Simple circuits like power supply, charger, op amps – all analog circuitry.

All of the programs on this web page are absolutely free and are very good at what you want, especially LT Spice. The only drawback is, that they put an emphasis on Linear Technology components, but what would you expect from the company that gives you the software for free.
Furthermore, there are usegroups ‘out there’, dedicated to LT Spice

http://www.linear.com/designtools/software/

.

DesignSpark PCB version 2 Introduction Video