AdminJS is a backend-agnostic Administration Framwork.
Using Roughdraft.js you can create prototypes of HTML mock-up quickly without duplicating markup or having to source fake content.
If you have responsive elements on your website and you want to center them out, this particular plugin will automatically do it for you.
This is a JS layout library and it utilizes bin-packing algorithm. You can use this to create clever and crazy layouts.
This is an open-source and a free JS library made by Mozilla. It adds collaboration tools to your website.
This particular tool will create an invisible parameter around an element allowing you to monitor breach by mouse cursors.
This is a set of directives and you can use this to wrap chart.js library for use with angular.
If you enjoy working directly with DOM, HTML.js will let you do just that.
25. Html Inspector
If you are looking to test the quality of your code and help you and your time write better markup, this is the tool for you. It runs in the browser.
This particular tool will let the visitors to your website control it by voice command.
As the name suggest, this allow you to highlight syntax on the web.
Use this tool to make use of your favicon with badges, videos, or images.
This is the missing link between vector graphics and spreadsheets, bound to prove quite useful.
Strictly for measurement purposes – you can use it to create Photoshop like guidelines and rulers on a website.
18. Medium Editor
This is a clone for WYSIWYG editor.
This particular tool is easy to use and object oriented. It will allow you to create graphs – works well for both designers and developers.
16. Sir Trevor js
This tool allows you to innovatively edit rich content on the internet. It will not have presumptions regarding how a specific element is rendered.
This particular tool provides skeumorphic interface and progressively enhances credit card inputs.
13. Wide Area
For a framework to run, it has its own iFrame. This allows for no conflicts between different frameworks.
If you are looking to create ambitious web applications, this is the framework for you.
Make amazing presentations with HTML5. It is also very easy to use.
This particular tool will react to the orientation of a smart device. It uses position of the cursors in order to do so, so it works even without the presence of a gyroscope etc.
In order for you to build semantic templates easily and effectively, you need Handlebars.js. It shall provide you with the necessary power.
This is a user-friendly Regex Generator. It does not work flawlessly on Internet Explorer. The groups are limited to only 7. There is no support for negative character classes. But it still is better than nothing and quite useful.
2. JS Bin