21 Lists - Send and receive targeted, paid microtasks
Hero Trainer - Game rewards for steps
Bitbounce - Charge unsolicited email senders a cryptocurrency fee
Launch - Free book featuring practical tips from top Product Managers
SafeDrive - Get rewarded for NOT texting while driving
Picoworkers - Earn money from doing short, easy tasks similar to Microworkers. Picoworkers is the best alternative to Microworkers I ever find.