Let's see, there were a few others shot in/around Austin in the 70s and 80s.
I specifically recall Heartbreak Hotel because I was an extra in it, a high school auditorium scene where Elvis performs with a student. I was in the audience. That was late 80s, 1988 I think.
A personal favorite of mine, Fandango, starring a young Kevin Costner and Judd Nelson, was shot from Austin to West Texas. Any Longhorn fan that hasn't seen this one, should.
A couple others I can recall were Honesysuckle Rose, and the Best Little Whorehouse in Texas.
And then I believe the original Texas Chainsaw Massacre, from the 70s, was filmed here.