[Groxx]

I've seen mobile on a moderate number of mobile-web-app side projects... though I haven't looked into these lately with anywhere near the frequency that I did a couple years ago. Generally it seemed pretty quick and easy to do good-quality simple stuff (like UI), though nobody did much beyond that because it was tricky to fine tune (like UI). Not sure what (if any) the current hotness is, aside from React + random components found online.