: Navigate to the Updates & Add-ons (or Plug-ins ) tab. Here you will find official releases like the Revit Site Designer Extension or Steel Connections for Revit 2018 .

, though as an older version, availability may be limited to subscribers with specific entitlements. Autodesk Community, Autodesk Forums, Autodesk Forum Official Autodesk Download Method

: Originally a subscription-only tool for 2018, it automates the creation of precast elements. Top Third-Party Extensions (Free & Paid)

To download and install Revit extensions for Autodesk Revit 2018: