The following databases are great resources for accessing an array of government documents, from historical to current.
Because e-filing is so prevalent now, the other place to look for filings is on the court's website, where many of these materials are now made available. If you're having difficulty tracking down court filings, contact a research librarian.
Federal legislative materials, including bill versions, the Congressional Record, CRS reports, committee hearings, committee reports, committee prints, etc., can be found in a number of different places, many linked below. State legislative materials can be more of a challenge. Start with the state's legislative website; for more recent legislation, you can check Westlaw/Lexis. Another excellent resource is our Government Information Librarian, Jennifer Morgan, who is expert at tracking down legislative materials.
