FPSMeter is a simple JavaScript library for sexy, fast, and themable FPS meter. It can measure:

• Frames per second
• Number of milliseconds between frames
• Number of milliseconds it takes to render one frame

FPSMeter supports multiple instances on one page, has show/hide methods that also pause the meter rendering, and color heatmaps that make themes even more pretty!

csscss is a CSS redundancy analyzer, it will parse any CSS files you give it and let you know which rule sets have duplicated declarations.

One of the best strategies to maintain CSS is to reduce duplication as much as possible. To do that, you need to have all the rule sets in your head at all times. That’s hard, csscss is easy.

Polycode is a free, open source framework for building cross platform games and interactive applications.

You can use Polycode as a C++ library or write everything in Lua using the Polycode IDE. Polycode’s API is designed around the “do more with less code” philosophy. It uses a managed scenegraph system that takes care of rendering and updates, but provides the ability to do custom rendering and updates if you so wish.

Draggabilly is a lightweight JavaScript library to make HTML elements draggable.

It supports IE8+ and works great on mobile with touch.

Nodemailer is an easy to use module to send e-mails with Node.JS (using SMTP or sendmail or Amazon SES) and is unicode friendly – You can use any characters you like.

Nodemailer is Windows friendly, you can install it with npm on Windows just like any other module, there are no compiled dependencies. Use it from Azure or from your Windows box hassle free.

• HTML content as well as plain text alternative
• Attachments (including attachment streaming for sending larger files)
• Embedded images in HTML
• SSL/STARTTLS for secure e-mail delivery
• XOAUTH2 authentication and token generation support – useful with Gmail
• DKIM signing

MagicSuggest is a free auto suggest combo built using jQuery on Bootstrap styled theme. The plugin is flexible and offers many customization.

The trigger is visible and the selected items appear within the combo itself. User can toggle the suggestions using arrow keys & delete with backspace.

LESS is a dynamic stylesheet language. It extends CSS with dynamic behavior such as variables, mixins, operations and functions. It runs on both the server-side (with Node.js and Rhino) or client-side (modern browsers only).

LESSHat is a universal mixin library featuring a bunch of smart LESS mixins.

• Universal
  If it’s possible in CSS, it must be possible to be done with a mixin. Unlimited number of anything, shadows, gradients, gradient swatches
• Cross-browser
  The library should export CSS for all available browsers. Old gradient syntax for iOS4? Totally!
• Configurable
  Building a webkit app? Turn off all other browsers and get just CSS3 and -webkit- extensions without the clutter

Intro.js a small script which offers a better way for new feature introduction and step-by-step users guide for your website and project. It comes with the ability to navigate with mouse and keyboard arrows.

If you are using the rails asset pipeline you can use the introjs-rails gem and use this project for Yii framework.

Antwort offers responsive template for emails & newsletters that fits and adapt to client widths. Don’t underwhelm desktop users with single column layouts that work for mobile. Antwort offers columns on desktop that automatically become rows on mobile.

Originally made for transactional Emails with dynamic content so the layouts are thoroughly tested – in live environments with real data and edge cases.

• Works in Outlook (2000+)
• Bulletproof layouts: made with dynamic content in mind
• Minimalist in design for maximum customization

Preboot is a collection of LESS mixins and variables for quickly writing CSS. As the precursor to Bootstrap, it serves as a lightweight and interface agnostic approach to jumpstarting your next web project.

Preboot has been reborn with many of the LESS variable and mixin improvements from Bootstrap, along with some new enhancements, too. It’s one of the lightest and most powerful tools for CSS development without any prebuilt components.