GPS Status & Toolbox - Display your GPS and sensor data: Shows the position, number and signal strength of GPS satellites.
draw.io - Online diagramming application
VisualGPSView - VisualGPSView incorporates many advanced features found in professional programs.
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.
Bee Story - The main character of this story is a charming bee.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.