Fragments. Network an in the work Microtask application platform
Fragments aims to provide a micro-task app platform where developers are encouraged to build systems like those described above, as well as many others which we cannot imagine today. The platform handles the mundane services such as task distribution, payments, identity verification, and agreements. It provides frameworks for easy integration even to mobile platforms, while developers can focus on the core of their apps such as task completion, and earning tokens if their apps are used. Requesters can take advantage of ready-to-use micro-task apps and hence, adding human power to your algorithms becomes as easy as acquiring some cryptocurrency, adding a framework to your project and setting a few parameters. Annotators use micro-task apps they are comfortable with on devices of their choice and earn tokens for task completion.
Whitepaper: https://fragments.network/fragments-platform-whitepaper.pdf