Stealthy: Secret Messenger - Chat anonymously with friends & strangers
Creddon - Tweet for a cause and a sponsor will donate $1 to charity
Berkanan - Chat with people nearby. Even offline, on an ✈️.
UpEffect - Crowdfunding for social good products
ShareAccount - Share your account without giving out your password
eSolidar - Charity shops and online auctions to support great causes