Pendo - Pendo helps product teams understand and guide users to create product experiences that customers love.
draw.io - Online diagramming application
Sitecore - Sitecore A/S has produced the Sitecore content management system since 1999.
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.
Kustomer - Kustomer is the first intelligent CRM for customer experience that enables you to know everything about every customer.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.