always-done
Handle completion and errors with elegance! Support for streams, callbacks, promises, child processes, async/await and sync functions. A drop-in replacement for [async-done][] - pass 100% of its tests plus more
is-hybrid
Check whether an object looks like Hybrid which is promises-a+ promise and callback api
to-callback
Converts result-first callbacks to classic (node.js-style) error-first callbacks with 3 lines of code. Useful when you want to promisify result-first APIs (like emitter.on). Inspired by [rfpify][] and probably used in it.
