draw.io - Online diagramming application
LennyFaces.net - Cheatsheets for various lenny faces ( ͡° ͜ʖ ͡°)
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.
Text Emoticon Generator - Generate any kind of text emoticon easier than ever
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
Simply Learn Japanese - Learn Japanese with 1000 phrases and intelligent flashcards