Alaska is the only state that does not collect state sales tax or levy an individual income tax. To finance state operations, Alaska depends primarily on petroleum revenues. Some of its cities and other local jurisdictions, however, do collect sales tax revenue. More on Alaska taxes can be found in the tabbed pages below.
http://www.bankrate.com/brm/itax/edit/state/profiles/state_tax_Aka.asp
Texas does not collect individual income taxes, but there is a State Sales tax.