6sense - 6sense is a B2B predictive intelligence engine for marketing and sales.
draw.io - Online diagramming application
Leadiro - Seriously Smart & Live B2B Data
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.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.