GetIllustrations has a wide variety of royalty-free art that you can download. There are multiple packages so that the person can choose the options that it best for them. I like that there is a free option, so you can sign up and try GetIllustrations before purchasing a wider variety of images. Additionally, the images share a very similar style so that your project will look cohesive. Review collected by and hosted on G2.com.

As it is nice that the art shares a similar style for cohesion purposes, I wish there was more variety in the type of image art. The art feels very "clip art-esk" which decreases the number of applications you can use it with. Review collected by and hosted on G2.com.