The Westlaw TRIALORDERS-ALL database, which contains "selected civil trial court orders from state trial courts state trial court opinions." Most of these are, to my knowledge, not findable in the ALLSTATES database.
TRIALORDERS-ALL has been around for at least a couple of years, but I hadn't heard of it, so I assume that many of our readers wouldn't have heard about it, either. Potentially very useful if you're researching the kinds of issues that only rarely make their way to appellate courts, or if you want to figure out more details about what happened at trial in a particular case that did go up on appeal.
Another interesting database: STATE-FILING-ALL, which contains various filings in state trial courts.