Totango - Totango is a Customer Success Software Platform
draw.io - Online diagramming application
Churnzero - ChurnZero is the Customer Success Platform built for growing SaaS and subscription businesses.
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.
Planhat - Customer success has changed. Meet the modern Customer Platform!
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.