HandUp Campaigns - Assemble your community to donate to those in need
WeShelter - Unlock a donation when you pass a homeless person in NYC
CampaignWith - Teach a class to fundraise for a cause you care about
TAP London - Tackling the homeless problem together
Dollar A Day - Automatically donate $1 a day to featured nonprofits.
Catchafire - Use your professional skills to help charities