The speech recognition API was added to browser specs some time ago, and we've since got partial support from the main browsers. The article goes through how it works and includes some examples (be sure to open the examples in a new window so you can accept the permission dialog).
Built using D3 and React, nivo is a collections of reusable charts, maps, graphs and visualisations that can be dropped into your project to add various interactive visualisations.
A router for static sites built for speed and for its low footprint (2kb-ish). A new tool, but seems fairly interesting, from the guys at fireship.io.