Legal Search Engines
FindLaw
http://www.findlaw.com/
A directory of legal web sites, produced by the people behind LawCrawler.
LawCrawler
http://lawcrawler.findlaw.com/
An Google-powered search engine that returns information only from sites that have been identified as dealing with legal issues.
Law.com
http://www.law.com/
You won't find the ability to search legal-related web pages, but there are lots of links, and the service offers free e-mail assistance if you still can't find what you are looking for, after visiting the site. Simply click on the Free Help button at the top of the home page to get help.
Government Search Engines
FirstGov
http://www.firstgov.gov/
Provides searchable access to information from the US government plus US state and local governments. Information can also be browsed by category.
Google US Government Search
http://www.google.com/unclesam
Special edition of the Google search engine that limits results to pages from US government web sites.
SearchGov.com
http://www.searchgov.com/
Search engine that crawls US government and state government web sites.
usgovsearch
http://usgovsearch.northernlight.com/
Searches across US government web sites and information from the NTIS (National Technical Information Service).
Government Information on the Internet
http://www.notess.com/write/gioti/
Not a search engine but a well-respected book about finding government information online. | 
