Skrlla - Send $1 to charity in a single tap
Charity Navigator - Charity assessment application.
Nifflr - Use computer's processing power to earn money for charity
Charity Miles - With the usage of this application you will always able to earn a win-win fitness situation for your goal.
Creddon - Tweet for a cause and a sponsor will donate $1 to charity
SafeNight - Providing a safe night to domestic violence survivors