Prolific - Quickly find high-quality survey participants
Google Opinion Rewards - Answer quick surveys and earn Google Play credits with Google Opinion Rewards.
InboxDollars - Earn cash for your everyday online activities.
CashPirate - Download CashPirate app for Android. ayeT-Studios' personalized beta-testing program that pays mobile phone users to download and install new apps. .
Swagbucks - Swagbucks is a loyalty program that offers individuals rewards for engaging in various activities. Users can earn reward points for performing Internet searches, purchasing items from affiliated vendors, or completing polls.
Receipt Hog - A fun and rewarding way to turn everyday shopping receipts into cash.