Statute Law Database
Not terribly exciting but nevertheless useful if you need to access the full text of UK statutes. "The UK Statute Law Database (SLD) is the official revised edition of the primary legislation of the United Kingdom made available online." There are simple and advanced search options, and a system of icons enables the user to track changes in legislation over time. The advanced search option stores recent searches even after the user logs-off so it is possible to view the results next time you log-in. The real downside is that it doesn't appear possible to search the content of the statutes you still have to wade through them all to find what you need.