Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Pinterest - Pinterest is a visual discovery tool that you can use to find ideas for all your projects and interests.
Smartmockups - Create stunning product mockups, easily and online.
DeviantArt - deviantART was created to entertain, inspire, and empower the artist in all of us.
Placeit - Generate realistic product shots in seconds
Juxtapost - Bookmark, share and discover all your favorite things, side-by-side.