Granted, the information is geared toward education, but I've found that the information it contains to be useful under a variety of contexts. Findlaw You can search this database for legal information. This will link to you to many publications which you can freely use without fear of copyright infringement. However, you should realize that this stuff is old, really old. This site contains a search tool for mailing lists.
Mailing lists can be an excellent means to obtain information from specialized areas.
Also, you would have the ability to posts queries to the list and obtain information from other people subscribed to the list. This site contains many medical studies and allows you to search Medline for specific research. You will have to register before using. This site is an index where you can access any State's Constitution and, if possible, statutes. This is an online index for people who publish humanities papers on the Web.