[matham]

I have been using DDG a little more frequently recently, however, it's image search was useless whenever I tried it.

[throwaway47380]

Funnily enough, my experience is that the best image search engine is Yandex's. E.g. searching for a page from a comic with Google just gives me random comics, but Yandex's will more often find that exact comic.

[chris_f]

Also, Yandex has an reverse image search [0] that works for faces. It's a little creepy, but an interesting tool to find similar looking pictures of people.

[0] https://yandex.com/images/