Visustin - Visustin is a flowchart generator to make you able to visualize your source code UML activity diagrams and flowcharts.
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.
Creately - The new interface for work to ideate, plan, and execute
draw.io - Online diagramming application
EazyStock - Smart demand forecasting and inventory optimisation software
Visio - Simplify and communicate complex information using data-linked diagrams.