Where is the custom widget gallery it´s has been moved, can not find the old download widget gallery with shared widgets, there may be some who have a link? for download widgets
Kim,
I am not aware of a specific custom widget gallery. You can just search ArcGIS.com for flex widgets though:
http://www.arcgis.com/home/search.html?q=Flex%20widgets&t=content
You may also want to try searching the ArcScripts, which might be what you are referring to.
ArcScripts Home - ESRI Support
This link can be found on the support.esri.com page too.