Complexify is a jQuery plugin for accurately telling users how secure is their password.

The developer puts the motivation behind this plugin very succinctly:

If your password is 8 characters long and only formed of lower case characters, you need to make it better, perhaps by adding a number or more characters.

If your password is 25 characters long but happens to not contain a number, you shouldn’t be forced by a password security policy to add one, you clearly have a very secure password.

The minimum criteria for a password’s complexity are quite satisfactory: a minimum-security password should take at least 600 years to crack on a commodity machine.

• Website: http://danpalmer.me/jquery-complexify

Gumby is a user-friendly CSS Grid framework with extended support of HTML5 and CSS3 goodies.

Gumby is meticulously documented and easy to grasp; in fact, it’s similar to numerous CSS frameworks — especially 960 grids — out there.

The framework ships together with some reusable elements that allow constructing prototypes rapidly; there is extensive support for mobile devices, too.

• Website: http://www.gumbyframework.com/

Renee is an innovative Ruby framework, based on Rack. 

Renee features an impressive, hierarchy-based routing system along with a rendering engine inspired by Tilt.

The code is amazingly lean, and offers DRY-er code than Sinatra, while making some safe assumptions about the way your requests will be structured.

• Website: http://reneerb.com/

ALAJAX is a jQuery plugin for turning your forms AJAX with a few lines of code.

ALAJAX works even with dynamic (JS-powered) forms, replacing default functionality and turning regular requests into AJAX requests, then translating them for the server.

The plugin is lightweight, meticulously documented, and easy to modify if that’s your thing.

• Website: http://www.alajax.com/

visitor.js is a service that provides real-time info on visitors and allows you to tailor your site according to the visitor’s needs.

visitor.js provides information about the visitor’s location, source (referrer), device, and more.

This allows you to redirect users to localisations of your website, offer discounts to returning customers, and so on.

Visitor is a paid service, but you can try it for 30 days and get refunded if you don’t like it.

• Website: http://www.visitorjs.com/

Singool.js is a lightweight framework for creating single-page apps.

Singool is built on top of Backbone, and requires Node.js as well.

Being MVC-based, Singool is rather easy to grasp; it uses LESS for CSS, for Bootstrap compatibility.

Although the framework doesn’t bring much new to the table, Singool manages to concatenate useful principles together to form a structurally fluid whole.

• Website: http://fahad19.github.com/singool/