Snoball is a free platform to enable users to give to whom they want, how they want. Users (individuals, companies, or nonprofits) create "Snoballs" - giving guidelines that specify how they want to give and to whom. These Snoballs can be shared and adapted by other users, creating a “snoball effect” for giving.
Fundraising on foursquare Using Snoball via Foursquare Day Blog
Snoball is an awesome
site that allows individuals, companies and brands to raise money for
charities through social media, including with foursquare check-ins. I
recently used it as a fundraising tool when Foursquare Houston co-sponsored
the Houston Tweet Drive for our December monthly meet-up. It is
super-easy to set up and is extremely flexible and manageable.