draw.io - Online diagramming application
Ashampoo 3D CAD Professional 10 - Ashampoo 3D CAD Professional 8 is a complete CAD solution for the designers and decorator that are looking for the centralized way to get done with their interior designer.
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.
ExhibitCore Floor Planner - ExhibitCore Floor planner is a tool that enables you to quickly create 2D floor plans of any home...
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
3Dream - Design your room in 3D quickly and easily.