BucketListly Photos — Creative commons photos tagged by country.
Coverr — Free stock videos for your homepage.
DesignersPics — Free high-res photos for use.
FreePhotos.cc — Free stock and royalty-free images.
Gratisography — High-resolution photographs.
Mazwai — Free stock video snippets.
Pexels Photos — Free stock photos - public domain and CC.
Pexels Videos — Free stock videos.
Pixeden — Free designer graphics.
Public Domain Images Archive — Free public domain stock photos.
Skuawk — Curated public domain photos.
Stock Music — Royalty-free music.
Stock Up — 15,000+ indexed photos from over 30 different stock photography sites.
Superfamous — Stock landscape photos with a CC license.
The Pattern Library — Free pattern images.
Unsplash — High-resolution photos.
Vastpic — Free high-res photos.
Videvo — Free stock motion graphics and video.
Vimeo — Free HD stock footage.
VisualHunt — Free high-quality stock photos from many different sites.
Audio Library — Browse and download free music and sound effects.
Your Vector Maps — Site with a bunch of links to vector-based maps and shapefiles of the whole Earth. Good for building things in Illustrator or Sketch or the web.