NJ gets a huge thumbs-up for one of the best of the online state archives. There are some terrific family history tools, dating back to Colonial days, and even a very unusual (and very useful) database of legal name changes recorded in the state. If you want to see what a good online archive looks like, check out New Jersey.
Established in 1895, this is one of the nation's first state museums founded with an educational mission. Today that mission encompasses four areas: archaeology/ethnology, cultural history, fine art, and natural history.