de taalunie can be a little bit annoying at times, but they help standardise the language (with their groene boekje) which i suppose is pretty nice. other than that they mostly help people with the language, including in former dutch colonies! but if you really want a cool dutch language authority....

onzetaal is really cool :3

they're friendly and they have a cool magazine with cool linguistic facts in it and i love it and aaaa

they're very good little descriptors and they document everything, including speech considered archaic

they recently did some research into making the dutch language more inclusive which i think is pretty cool