It woudl be useful if there was a central repository for Add-ins so that the Add-Ins are easy to find, similar to http://wordpress.org/plugins/
I have a couple useful add-ins and I have no idea where I got them from. It would be nice to know what license they have (can they be shared), if they have been updated recently, if they are compatible with 10.2.1, and I would like to know if the add-in is still relevent for the new version of ArcGIS.