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Ajax with less suck - (and node.js HTTP client to match)
Reactive libraries for Angular
Dropzone is an easy to use drag'n'drop library. It supports image previews and shows nice progress bars.
Full Featured HTML Framework For Building iOS & Android Apps
Offline storage, improved. Wraps IndexedDB, WebSQL, or localStorage using a simple but powerful API.
A datepicker for @twitter bootstrap forked from Stefan Petre's (of eyecon.ro), improvements by @eternicode
Filament is a real-time physically based rendering engine for Android, iOS, Windows, Linux, macOS and WASM/WebGL
Animate on scroll library
A lightweight and modular front-end framework for developing fast and powerful web interfaces.