pify
Promisify a callback-style function
call-me-maybe
Let your JS API users either give you a callback or receive a promise
then-denodeify
[![NPM](https://nodei.co/npm/then-denodeify.png)](https://nodei.co/npm/then-denodeify/)
ts-pfy
Transforms callback-based function into a Promise-based (TypeScript-friendly)