I found this global list of Free apps an impressive info source and very useful. 

"To help you get the best of the free ones, we have selected some gems in each category and added them here in a convenient list with clear and brief descriptions of each application item."

12 pages of totally free Android linked apps by category with several selections of those judged outstanding in that category.

Check it out !

http://www.techsupportalert.com/best-free-android-apps.htm?page=0,0&%24Version=0