Creative Market - Buy and sell handcrafted, mousemade design content like vector patterns, icons, photoshop brushes, fonts and more at Creative Market.
UI Garage - Specific mobile and web design patterns for your inspiration
SocialSizes - Sketch templates for sharing images & videos on social media
Muzli - UI/UX and Design Inspiration Chrome Extension
Headers.me - Create social cover images that get you followers
Design Hunt - Curated design inspiration for everyone