Polymaps is a free JavaScript mapping library for making dynamic, interactive maps in modern web browsers. It creates image and vector tiled maps using SVG.

Polymaps provides speedy display of multi-zoom datasets over maps, and supports a variety of visual presentations for tiled vector data, in addition to the usual cartography from OpenStreetMap, CloudMade, Bing, and other providers of image-based web maps.

The gcons fever is raising and here comes-in another PNG icon set, Vibricons. The name of this icons set is inspired by the open source icons – gcons.

Vibricons contains popular types of icons and symbols with vibrant and bold colours. The volume 1 comes with 15 png icons in 128, 64 and 32 px sizes.

Web applications like Gmail, Facebook, Campfire and Pandora are becoming more and more like desktop applications every day. Running each of these web apps in an individual tab in your browser can be a real pain.

Fluid lets you create a Site Specific Browser (SSB) out of any website or web application, effectively turning your favorite web apps into desktop apps.

Features

• Open Plug-in Architecture
• Built-in Userscripting
• Single-Window Browsing Mode
• BrowsaBrowsa Plug-in for Sidebars
• Twitter Timeline Plug-in
• Thumbnail Plug-in for CoverFlow

A sprite combines multiple background images into a single image. This is a technique for making web pages faster because it reduces the number of downloads in the page.

Background images make pages look good, but also make them slower. Each background image is an extra HTTP request. There’s a fix: combine background images into a CSS sprite. But creating sprites is hard, requiring arcane knowledge and lots of trial and error.

SpriteMe removes the hassles with the click of a button.

• Finds background images
• Groups images into sprites
• Generates the sprite
• Recomputes CSS background-positions
• Injects the sprite into the current page

Rapportive is a free plugin for Firefox, Safari, Mailplane (a standalone Gmail application for Mac), and Chrome to replace you gmail sidebar with rich contact profiles. Rapportive shows you everything about your contacts right inside your inbox.

You can immediately see what people look like, where they’re based, and what they do. You can establish rapport by mentioning shared interests. You can grow your network by connecting on LinkedIn, Twitter, Facebook and more. And you can record thoughts for later by leaving notes.

Hyde is a static website generator powered by Python & Django. Hyde supports all the Django template tags & filters and even has a few of its own. The built-in web server and auto-generator provide instant refresh and unlimited flexibility.

Features

• No database, no slowness, no digg-effect
• Dynamic content can be displayed using javascript
• Templates are dynamic, output is static
• Efficient versioning using source control systems

There are two layouts currently available: default and simple. The default site layout contains templates for basic site structure, navigation, breadcrumbs, listing, posts and Atom feed and a very basic stylesheet.

The default template supports Typogrify, which is a collection of Django template filters that help prettify your web typography by preventing ugly quotes and widows.

SlideShow is an extendable, flexible, and easy to implement MooTools Slideshow Widget. Use any element, not just images; this slideshow widget can be used to create:

• Slideshows
• Image galleries
• Tabs
• News tickers

Slideshow comes with packaged transitions but is easy to extend and create your own transitions. The class is built to handle the basics of a slideshow, extend it to implement your own navigation piece and custom transitions.

Primary is a small yet effective open source CSS framework for designers and developers in order to make using CSS as easy as possible. It comes with a collection of 22 ready to use CSS layouts to start your project today.

WooCons, name inspired by gcons, is a set of 170 Free Web Icons by WooThemes. This crispy and tasty icons set is available as 32×32 PNG’s. A colorful collection of widely used icons, perfect for web applications and web sites.

Previously, Greepit shared an HTML5-CSS3 project template that contains the basic structure for a new HTML5-CSS3 projects.

HTML5 ★ Boilerplate is another awesome HTML5, CSS3 and JavaScript template that can be used as a base html5 template for your next project for a fast, robust and future-proof site.

HTML5 ★ Boilerplate is not a framework, nor does it prescribe any philosophy of development, it’s just got some tricks to get your project off the ground quickly and right-footed. Its for sure an awesome set of files that a front-end developer can use to get started on a website.

Features

• Cross-browser compatible
• Optimal caching and compression rules for grade-A performance
• Mobile browser optimizations
• Progressive enhancement graceful degradation