One of the better free U.S. case law sites has, for years, been LexisOne, a site powered by LexisNexis case law right down to the ability to search by document segment (counsel, court, etc.). It didn’t match the paid subscription version of LexisNexis but it was an excellent starting point. That site is now gone, and the resources have been shifted laterally into LexisNexis’ social community site.
The good news is you can still create an account (or use your old one) and search case law for free. The benefits of using LexisOne continue in the new site. The requirement to access it through the LexisNexis community portal is not at all surprising, if looked at it from LexisNexis’ perspective. I’ve spent little time in there and this will likely make me use it more often. There are elements that can be customized, mostly related to news and current awareness. There are quick links to professional and practice area sub-sites, although some of them are outside the community portal and accessible without a log-in.