Vincent - Your one-stop inbox for design and frontend news.
Invision - Prototyping and collaboration for design teams
Creators Supply Newsletter - A weekly curated newsletter of everything useful in design
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.
Web Designer News - Curated stories for designers
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.