Free ISPs (Internet Service Provider)

Be sure to read the user agreements for hidden costs or usage limits.

Access-4-Free 10 hours free Internet access every month No ads, no banners, no contracts, Free e-mail (Web mail and POP mail), Reliable & fast connection, No special software required, Compatible with AOL, MSN, Yahoo and ICQ Instant Messaging

Address  Free Internet Access, Free web-based email account, Online Customer Support, Web directory and search engine, Enabled for web browsing and browser based applications only, No hourly limit, Requires monthly completion of offers.

NetZero You'll see a small advertising banner on your screen when you're on the net but it is moveable so you can live with it. They have access numbers for just about every US state. Baud rate avg. 28.8kbps 10 hours limited use per month

Zubee Free Free ISP for Canada and the USA.
Fast unlimited free internet access to most of North American, including Alaska and Hawaii.

Services 

All Free ISP  A Free ISP service that locates a free or low cost ISP in your area (USA only and not available in all areas)

FreedomList  A free service that locates free or low cost ISP services in various countries worldwide. (some local telephone charges may apply)