Aside from movies, Robbin Williams guest stared in a lot of popular television shows as well!
He did. I've seen him in SNL, Friends, and so on. He was also a great standup comedian.
A lot of networks like Netflix have added his movies and shows to their library in honor of him!
I hope they add his tv series Mork & Mindy on there. That is where he first started his career. 
My favorite movie he has starred in is Dead Poets Society, but I also really like Aladdin. 
I have not seen that movie yet. The first movie I saw from him was Good will hunting which earned him an Oscar. 
In his lifetime, he has also won five Grammy's, four Golden Globes, and two Emmy's