Chat Amongst Yourselves was a breakable toy built with Angular that I'm particularly happy about it, despite the fact that it doesn't work.
The challenge I was presented with when building this was to create a client side chat app and host it, under a tight deadline. Although I couldn't figure out the functionality on it, I was particularly pleased with being able to meet the deadline, utilizing Angular and figuring it out how to host it on my own.
You can see the final result here.