I've been working on my side project https://checkweather.sg/ - weather rain radar on a map thingie. Looks simple, usually boring when there's no rain, but I got to learn how to build those cool vector radars with d3-contour, Mapbox GL JS and stuff. Example: https://twitter.com/cheeaun/status/1259698644908834816

And a React Native iOS app to complement it https://twitter.com/cheeaun/status/1256206047837958144