SmartDraw - Instead of starting with a blank screen, SmartDraw gives you the exact template you need.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Creately - The new interface for work to ideate, plan, and execute
Invision - Prototyping and collaboration for design teams
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
Sketch - Professional digital design for Mac.