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.
Havenly - Havenly designs your room. We connect you with professional interior designers and help you get everything you need for a beautiful room, for one flat fee. No hassle, fun decorating.
draw.io - Online diagramming application
Decorist - Beautiful online interior design for a low flat fee.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
Laurel & Wolf - 99 designs for Interior Design