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.
PlanoHero - PlanoHero - is a cloud service for automating planogramming processes, analyzing store plans and planograms.
draw.io - Online diagramming application
Creately - The new interface for work to ideate, plan, and execute
OmniGraffle - OmniGraffle is for creating precise graphics like website wireframes, an electrical system designs, or mapping out software class.
Visustin - Visustin is a flowchart generator to make you able to visualize your source code UML activity diagrams and flowcharts.