Lexis/ Nexis

Westlaw

Jurisline (Free site covering all States and Federal cases and Statutes)

Loislaw (State and Federal cases and Statutes)

VersusLaw (Free to students and covers State, Federal, and USSC)

National Law Library (State case and statutory law, Fed circ, and USSC)

eLawCentral

Findlaw

CourtExpress (Records of pending cases)

Quicklaw (US, Canada, European and other foreign nations' cases)