What’s New in Revit 2018 – Official blog:
Google Cache
Coordination Model Link:
coordination model linking lets you use a Navisworks file as an underlay in Revit, making it easier to coordinate with outside teams that might not be working in Revit
Railings:
with Revit 2018 you can also attach railings to topography to model fencing, road barriers, or outdoor handrails
New Structural Features:
https://www.youtube.com/watch?v=HFL-YH4sFK8
Webinar on new features:
https://pages.autodesk.com/WhatsNewinRevit2018_RegistrationPage.html
Revit 2018 New API Features:
https://adn.autodesk.io/uploads/file/revit_2018_api_news/index.html
Download using the links at:
https://wrw.is/2017/03/autodesk-2018-direct-download-links.html