Delighted - The fastest and easiest way to gather actionable feedback from your customers
draw.io - Online diagramming application
UserTesting.com - Usability testing has never been easier. Get videos of real people speaking their thoughts as they use websites, mobile apps, prototypes and more!
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.
Promoter.io - Promoter is designed to capture actionable and accurate customer feedback that reduces churn and drives growth
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.