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.
Revizto - Revizto is an integrated BIM collaboration software platform that gives owners, designers, contractors, and facility managers the essential tools to streamline the building design and permitting process.
draw.io - Online diagramming application
WIZZCAD - WIZZCAD is the first Open BIM-based platform for the digital transformation of all your construction projects.
Visio - Simplify and communicate complex information using data-linked diagrams.
Enscape3D - Realtime Rendering Plugin for Revit. Live link from BIM to virtual walkthrough.