The Texas Portal to Texas History
The Portal is a gateway to Texas history materials. You may discover anything from an ancestor’s picture in a college yearbook to a rare historical map. - http://texashistory.unt.edu/
Just by the short time I have used it it has become a great tool in my family search, I already found several great stories in the Brownsville Herald, a South Texas Newspaper.
I can assure you that this website will become part of your tool box when researching family in Texas. What a great resource to start the month with. Happy hunting, enjoy.