Oozled - Curated resources for everything design related
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
PromoteProject - PromoteProject is a site where you can showcase your startup, blog posts, software, games and books.
Invision - Prototyping and collaboration for design teams
WD Stack - Curated resources for frontend designers/developers
Sketch - Professional digital design for Mac.