Prolific - Quickly find high-quality survey participants
Bloomerang - Bloomerang is a simple donor database and fundraising software solution that helps nonprofits decrease donor attrition and increase revenue.
Money Master - Money Master is a reward making app that offers you simple means of earning cash.
Kindful - Nonprofit donor database + fundraising tools all in one
InboxDollars - Earn cash for your everyday online activities.
Classy - Expressive, flexible, and powerful stylesheets for native iOS apps