Best Referral Programs - A curated directory of startup referral programs
UpEffect - Crowdfunding for social good products
Viral Loops - Viral Loops is a viral and referral marketing platform to launch ranking competitions, sweepstakes, pre-launch and referral programs.
Creddon - Tweet for a cause and a sponsor will donate $1 to charity
GrowSurf - Referral software for B2C, FinTech, and SaaS companies.
eSolidar - Charity shops and online auctions to support great causes