Lottie – Use after effects animations in web and native apps - https://news.ycombinator.com/item?id=29634114 - Dec 2021 (111 comments)
Lottie for Android, iOS, React Native, and Web - https://news.ycombinator.com/item?id=17209832 - June 2018 (18 comments)
Introducing Lottie: Airbnb's tool for adding animations to native apps - https://news.ycombinator.com/item?id=13543927 - Feb 2017 (97 comments)
Others?