Single-spa is a javascript framework for front-end microservices. Use multiple frameworks in a single-page application, allowing you to split code by functionality and have Angular, React, Vue.js, etc. apps all living in harmony.

Day.js is a minimalist JavaScript library that parses, validates, manipulates, and displays dates and times for modern browsers with a largely Moment.js-compatible API. If you use Moment.js, you already know how to use Day.js.

A complete open source analytics platform: frontend SDKs and API backed by a fully managed analytics infrastructure.