This public image database includes more than 400 thousand free pictures in amazing quality, besides vector graphics without copyright, as well as endless illustrations. All the works are selected by the Pixabay team, so you can be sure that all the images have very good quality.
The images are organized in categories such as animals, food, moods, monuments, religions, architecture, music, health, beauty, people, landscape, science, education, and much more. As if all of this wasn't enough, Pixabay has more than 20 languages, thanks to the voluntary contribution of dozens of translators throughout the world. This list grows constantly, and soon it might include even more languages.
Along the excellent search engine, Pixabay includes an exploration tab from which you have access to the editor's choice of images, the most recent images, the most wanted, as well as information about the photographers. You can also filter pictures by types of camera. From this option you can look for images taken with a Canon 5D, or with a Nikon D90.