I’m always on the hunt for design resources and today I came across a recommendation on the Instructional Designers in Education Facebook group to check out a roundup on the invisionapp.com website of “23 free device mockups every designer should have on hand”, as well as other UI kits. For quick mockups, these will be fun to try. I also occasionally draw from the 2 million community-developed and shared icons on thenounproject.com, as well as 1.6 million flat icons on flaticon.com.