Parse - Build applications faster with object and file storage, user authentication, push notifications, dashboard and more out of the box.
draw.io - Online diagramming application
Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
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.
AnyPresence - AnyPresence is an Enterprise Backend as a Service for mobile app development and API augmentation.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.