UX Flow Wireframe Prototyping System - Create beautiful user flows prototypes for your next project
iOS Design Kit - The newest library of native iOS templates
draw.io - Online diagramming application
Sketch Repo - Collection of resources for anyone who uses Sketch
UMLGraph - UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.
SketchApp.rocks - Index of all awesome things related to Sketch.