Plenty of Swedes also. Creating churches and schools. German/Swede congregations helped each other. Later it was the Irish who renovated, buying up old neighborhoods, creating today's hospitals and universities.
Interestingly, the diaspora is mostly concentrated around the same area too. New Sweden and Lund, TX are located just east of Austin, which is fairly close to the area mentioned in the article (Giddings) and the original Sweden, TX and Norway, TX are located south/southeast. Those towns are not terribly close, but also given Texas size, relatively close to above.