Screenshot Bin - Generate website screenshots and thumbnails at scale, right from your app. Screenshots as a service.
Isometrica - 3D illustration constructor with 380+ isometric objects
Passion Hacks - 170 Free isometric illustrations available as PNG & SVG files.
Characterz - Biggest diverse mix and match 3D illustration library
Khagwal 3D Illustration Library - Free 3D illustration library for web & mobile app designers
Craftwork - A collection of User Interface resources made by Craftwork