This is what I have bookmarked for the Exchange: https://creative.adobe.com/addons
It used to have the option of choosing a category (e.g. brushes, styles, actions) and return a large list of addons, many of them free and many of them applicable to Elements as well as CS. Now there is no option to select a category; just a search box. When I enter "brushes" it returns just a handful where it used to return many dozens. The five brush sets I downloaded long ago are no longer there. For example, the Return to Eden clouds brush set I had bookmarked at http://www.adobe.com/cfusion/exchange/index.cfm?event=extensionDetail&loc=en_us&extid=1041 011
Now when I click this it goes to the above creative.adobe.com link and the Return to Eden clouds set is not there.