UX Flow Wireframe Prototyping System - Create beautiful user flows prototypes for your next project
Pistachio Email Templates - Delicious newsletter templates built for automation
draw.io - Online diagramming application
Templates by Email Monster - Hundreds of free, responsive email templates. Pick and edit.
UMLGraph - UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.
SaaS Email Templates - Responsive HTML email templates for SaaS startups