Buffer - Buffer makes it super easy to share any page you're reading. Keep your Buffer topped up and we automagically share them for you through the day.
draw.io - Online diagramming application
OneUp - Schedule and automate posts on Facebook, Instagram, Twitter, Pinterest, LinkedIn, and Google My Business.
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.
InstaPost - Publish Instagram posts directly from Notion with the unique scheduling feature that enables you to plan and publish posts automatically.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.