Texas Counties for GIS and Assessor Links have been updated up to the letter 'T'. I was able to get a few more in the list than I scheduled, but U-Z will get updated by next week.
As per Texas, most counties do not have a direct GIS link as of yet. However, they are constantly updating and even though these are assessor links, some have GIS links in them. Others have Plat or Tax maps, while some are just basic legal information.