RoomForTea - A female-friendly housing network in London, UK.
draw.io - Online diagramming application
tripcake - Doodle for travel plans with friends
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.
Magpie - Female travelers club - meet women like you when you travel
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.