Small & fast DOM and event library that has “the same familiar API as jQuery”. Only 2KB minified and gzip’d, and you can create custom builds to exclude stuff you don’t need.
A boilerplate for Chrome app, extension, and theme development. It should be easy enough to get started even if you’ve never built a Chrome extension before.
Knwl.js scans through text, user data, or just about anything for data of interest, phone numbers, dates, locations, emails, times, and more.
A small graphical interface for letting users build their own webforms.
A cross framework and cross language way of validating data.
If there are any other tool, libraries or frameworks that you would like us to list, do let us know in the comments below. Happy surfing.