Pexels is a search engine for free stock photos you can use today. This should be your go-to destination when searching for a photo for your next project, or anything.
If you're looking for unique, authentic and sometimes imperfect stock photos - tookapic stock has all of that. Unique collection of photos from people running their 365 projects (one-photo-a-day journals). $39/mo or $99/y gives you unlimited access to more than 85.000 photos.