WeShelter - Unlock a donation when you pass a homeless person in NYC
Tango Card - Tango Card bundles an awesome catalog of e-gift cards and other e-rewards with easy-to-use technology and expert program support.
TAP London - Tackling the homeless problem together
Giftbit - Buy, send and track digital gift cards for your reward and incentive programs.
Catchafire - Use your professional skills to help charities
Tremendous - Tremendous is a customer and employee loyalty platform that allows companies to reward their customers for surveys promotions and referrals.