Free Images for Steemit posts

I have been writing a couple of posts in the last two months and I have been using images from Pixabay including the image used in this post.

It is a website for free images and I should say that they have really great quality images. I am planning to upload a few of my clicks as well so that other people can use it.

This post by @stellabelle triggered me to write this post. Going forward I am planning to add a line my post footers so that I don't miss out on giving the credits to the images.

What are the other websites that you use for free images? Do you have any other tips to make giving credits easier?