Stealthy: Secret Messenger - Chat anonymously with friends & strangers
UpEffect - Crowdfunding for social good products
Whisper.sh - Whisper is the best place to express yourself online. Connect with likeminded individuals and discover the unseen world around you.
Creddon - Tweet for a cause and a sponsor will donate $1 to charity
Bubi Chat - Location based anonymous chatting app
Public Design Vault - 500+ design tools for public good, all in one place