AEC-APPS website, the community-driven collection of apps for the AEC industry, created by SOM and CASE. The site was in Beta for these past 4 months. Now, at official launch, there's a plethora of Revit add-ins available on the site, and it's easy to browse for add-ins too, though I don't see a way to filter for just Revit add-ins. I got better results searching using the keyword "Revit".
Here's the official announcement for the AEC-APPS launch on the designreform blog.
I'll be posting on the Revit Add-ons blog about the add-ins I've not previously covered that I see on the AEC-APPS website.
My hat's off to SOM and CASE for pulling off this innovative idea!