draw.io - Online diagramming application
Loom - Loom is a screen recording extension for Chrome that gives people the ability to create and share media. Create your own videos using your camera, screen view, and audio. Read more about Loom.
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.
Tella - Capture your best work with video. Record in the browser, share instantly.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
ilos - ilos is a video capture, screen recording, hosting, analytics, and closed captioning inside one app.