unDraw is a constantly updated collection of beautiful svg images that you can use completely free and without attribution.
DrawKit is a collection of fully customisable PSD illustrations, in two styles, available to use on your next project, app, or website.
There are 80 awesome illustrations and 20 backgrounds in the pack. Every illustration is 100% vector. You can easily scale it to the size you need and use it for prints, in apps, on t-shifts etc. Illustrations are very easy in use, just change colors and shapes as you wish in a few clicks.