The free add-ins on the new website are as follows.
This free tool will automatically check your Revit models based on a
set of BIM requirements and generate a compliance report.
Autodesk Model Checker Configurator for Revit®
This free tool will allow you to make your own configuration
files for the Autodesk Model Checker for Revit.
Autodesk COBie Extension for Revit®
This free tool will allow you to set up your Revit models to capture COBie
data and then export that data to a COBie compliant spreadsheet.
Autodesk Classification Manager for Revit®
This free tool will allow you to quickly apply data from multiple
classification systems to all your elements.
There's more information available on the BIM Interoperability Tools website.
Editor's Note: Expect more detailed postings on each product as well as a comprehensive review of the Model Checker Configurator and Model Checker here on Revit Add-ons soon.
Product Review – Autodesk Model Checker for Revit and Autodesk Model Checker Configurator for Revit
Roundup – Autodesk Product Enhancements for Revit 2016
Credit: Luke Johnson's What Revit Wants.