This is awesome. I have been using unDraw and unsplash as well as some other things for my startup (shameless plug: https://makely.me)

Some feedback for the site: make the titles of each product a little more clear. For instance, "Free Stock Photos: High-Res Images for Websites & Commercial Use" doesn't tell me what the website is until I hover over it.

EDIT: Another thing, I was expecting the filters to be additive (i.e.: if I select "Art" and "Fonts", I would expect to see results from each category, instead I get nothing)