Azure DevOps - Visual Studio dev tools & services make app development easy for any platform & language. Try our Mac & Windows code editor, IDE, or Azure DevOps for free.
draw.io - Online diagramming application
Helix ALM - Helix ALM is the single, integrated application that lets you centralize and manage requirements, test cases, issues, and other development artifacts and their relationships.
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.
Visure - Visure offers a flexible , modern and complete requirements ALM Platform (Application Lifecycle Management).
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.