QuoteMaker.in - Quote Maker is one of the most addictive writing platforms, where you can showcase your quotes, poems, stories, and many more. New Experience to Share your Emotions.
draw.io - Online diagramming application
Pure Writer - fast, smooth, fluid, at any time, never lose content, Markdown, super reliable
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.
JotterPad - JotterPad Writer for Android — Turn your thoughts into text. Go about your creative writing without distractions, write to your hearts content...
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.