UAParser.js - Detect Browser, Engine, OS, CPU, and Device type/model from User-Agent & Client-Hints data. Supports browser & node.js environment.
Fallr.js - Fancy, simple, yet elegant message / alert / prompt / dialog / popup / notification / modal box jQuery plugin
Explr.js jQuery plugin - Create a "Windows Explorer"-like Tree structure
Sticklr.js - Sticky side panel jQuery plugin