Unsplash

Unsplash is a library of freely licensed photography that's become the default source for header images and cover art across the web, newsletters included. The photos are searchable, high-resolution, and licensed for commercial use without attribution required, which removes one of the more tedious parts of putting together a visual issue.

The catch worth knowing is that because it's so widely used, popular Unsplash images show up everywhere — so if visual distinctiveness matters to your brand, it's worth digging past the first page of results or pairing it with your own photography rather than using the top hit for every issue.