California Voter Foundation [nonprofit, nonpartisan organization] 
http://www.calvoter.org/

Easy Voter Guide
http://easyvoter.org 

League of Women Voters of California
http://ca.lwv.org/

NAICU: National Association of Independent Colleges & Universities
http://www.naicu.edu

Orange County Registrar of Voters
http://www.oc.ca.gov/election

Project Vote Smart--California Ballot Measures 
http://www.vote-smart.org/election_ballot_measures.php?state_id=CA&go2.x=12&go2.y=7

Smart Voter by the League of Women Voters 
http://www.smartvoter.org/