Ask HN: What free photo hosting service should I use for my GitHub projects?

I am looking for a reliable free photo hosting service where I can host images for my blogs and github projects. It would be nice if that service has album feature so that I can categorize uploaded images a/c project. So far I have tried Imgur and PostImage but they didn't appeal to me. Imgur wasn't user-friendly (no direct way to upload to existing album) whereas PostImage was buggy.