FREE
Pexels
Pexels provides high quality and completely free stock photos licensed under the Pexels license. All photos are nicely tagged, searchable and also easy to discover through their discover pages.
Pixabay
Pixabay.com is a website for sharing photos, illustrations, vector graphics, film footage and music, exclusively under the custom Pixabay license, a modified and somewhat more restrictive version of the Creative Commons CC0 license. Wikipedia
Unsplash
Unsplash is a website dedicated to sharing stock photography under the Unsplash license. The website claims over 207,000 contributing photographers and generates more than 17 billion photo impressions per month on their growing library of over 2 million photos. Wikipedia
PAID
Getty Images
Getty Images, Inc., is a British-American visual media company with headquarters in Seattle, Washington. It is a supplier of stock images, editorial photography, video and music for business and consumers, with an archive of over 200 million assets. Wikipedia
Imaging Software 