Cornell Law School's LII provides an overview of land use law and links to statutes, court decisions, and other materials at http://www.law.cornell.edu/topics/land_use.html.
The Uniform Residential Landlord and Tenant Act is available at http://www.law.upenn.edu/bll/.
For example, the Legal Information Institute (LII) at Cornell Law School publishes an article entitled "Landlord-Tenant Law: An Overview" at their Web site at http://www.law.cornell.edu/topics/landlord_tenant.html and Nolo Publishing Co. includes articles on a number of landlord-tenant issues, including roommates, at its Web site at http://www.nolo.com/lawcenter/index.cfm/catID/42F1A487-5FDD-45C5-84A2E323ABF31CC5/.
The Center for Commercial Real Estate provides helpful information on commercial leases at http://www.centerforcommercialrealestate.com/.
The attorney general's office for Washington State maintains a checklist for tenants moving into a home or apartment at http://www.wa.gov/ago/consumer/lt/LTChecklist.pdf that may be useful for tenants in any state.
Rentlaw.com has published information about security deposits and a brief summary of some state laws on security deposits at http://www.rentlaw.com/securitydeposit.htm.
The U.S. Department of Housing and Urban Development (HUD) provides information on real property issues for both consumers and businesses, including landlords, tenants, and victims of discrimination at http://www.hud.gov/.
It is at http://www.assetprotectionnews.com/apn3-3-fr.html.
The Uniform TOD Security Registration Act is available at the NCCUSL archives by going to http://www.law.upenn.edu/bll/ulc/ulc_frame.htm and selecting the act.