Creddon - Tweet for a cause and a sponsor will donate $1 to charity
eSolidar - Charity shops and online auctions to support great causes
Wunder - Impact investing meets Capitalism.
Public Design Vault - 500+ design tools for public good, all in one place
SearchLikes - Search activity Vkontakte (likes and comments)
JellyChip - Complete simple activities to donate to those in need