I would really like to see an implementation of Arrow that is compatible with NodeJS and modern web browsers. This would enable streaming columnar data to the browser without an intermediate conversion to JSON – I could imagine web-based data visualization systems would benefit substantially from this functionality.
Because Google's Flatbuffers library has first-class JS support, this should be achievable. Carlos Scheidegger created a prototype implementation of the Feather file format (basically: mini-Arrow) last year: https://github.com/wesm/feather/tree/master/js
This JIRA can be an umbrella issue for the JS implementation. As soon as we find interested contributors to work on this, we can create JIRAs and attach them to this issue until we reach a certain level of maturity.
Without starting a bike shed discussion, I humbly request that the implementation be done in TypeScript https://www.typescriptlang.org/