flatifycss
Modern flat design framework for the web — inspired by Duolingo design system.
datetimepicker
Responsive flat design jQuery DateTime Picker plugin for Web & Mobile
flat-cache
A simple key/value storage using files to persist the data
array.prototype.flat
An ES2019 spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as ES3.