Texas Department of Human Resources, offers medicaid, food stamps, check, dental programs for children, and more.
Salvation Army, offers overnight place to sleep. Food, clothing, and they also have a store. Usually by getting a slip from the office, they will normally let you get things for free from the store. Salvation Army also has church services, and may have other things that are not listed here.
There are so many places and resources in Texas, that i will have to do a special listing, for places that are close to you. Just ask.