I'm not going to hold these up as ideal examples of AngularJS apps, but you might find them interesting:
* https://github.com/JohnMunsch/PaperQuik
* https://github.com/JohnMunsch/ClearAndDraw
They're both deployed on the web so you can play with them to see if they're in any way interesting to you. I wrote both of them last year to play with and learn some things and then I open sourced both of them.
Good luck with your learning.