Reseller Hosting, SEO Hosting, VPS Hosting, and Dedicated Server plans are all allowed to resell their hosting. Shared Web Hosting plans are not allowed to resell.
Check out our reseller help section for tons of great information!
Tools a reseller will need:
Domain Reseller
WHM AutoPilot or WHMCS
Merchant Gateway
Hosting reseller templates
Shopping Carts
HostGator also encourages resellers to copy our Terms of Service, verbatim, and replace the name "HostGator" with your own company name. Of course, you may remove any parts you feel do not apply, but regardless of what you omit, you and your clients will be held to the HostGator Terms of Service.