draw.io - Online diagramming application
University of Reddit - Learn 1,000's of new things, from reddit
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.
reddit shell - Web-based shell for browsing reddit (pretend you're working)
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
Reddit App - The official app for Android & iOS. Meow.