All California Codes – from the official government site
Bill Information – full text of bills, including status, history, etc., available for free online.
California Legislature Home Page
California Legislature – Penal Code
California Legislature – Welfare and Institutions Code
California Rules of Court – from the California Courts site
Legislative Research, Inc. Calif. legislative research service (paid services require preauthorization for cases in the Third & Fifth Districts), which also contains some free commentary and instructional materials on the use of legislative intent material, as well as examples of motions for judicial notice.
State Archives Calif. legislative research (preauthorization required for cases in the Third & Fifth Districts).