The 960 Grid System is an effort to streamline web development workflow by providing commonly used dimensions, based on a width of 960 pixels. There are two variants: 12 and 16 columns, which can be used separately or in tandem.

The premise of the system is ideally suited to rapid prototyping, but it would work equally well when integrated into a production environment. There are printable sketch sheets, design layouts, and a CSS file that have identical measurements.

The 960 Grid System is free to use, and may be repurposed to meet your specific needs. Several projects have already spun off, including versions that were built to be fluid and elastic. Additionally, it appears that it will be adapted for Drupal.

These templates are offered Free of charge in accordance with the applicable licenses for 960 Grid System and Mootools.

WooThemes have adopted it as their framework of choice for commercial WordPress themes.

MochiKit is a highly documented and well tested, suite of JavaScript libraries that will help you get shit done, fast. We took all the good ideas we could find from our Python, Objective-C, etc. experience and adapted it to the crazy world of JavaScript.

deploy* is an open source web application that enables you to create your web project framework with ease.

It lets you to choose the:

• XHTML document type
• CSS file (blank or with resets)
• jQuery to be included or not. If yes, ask for some popular plugins
• major directories like images, includes to be added

Once the link that creates to project framework is bookmarked, same framework can be created with just a click.

The idea itself is very nice: “instantly starting a project with the preferred structure“. If more libraries, CSS frameworks would be supported, it can become much more flexible (as it is open source, anyone can add these).

SenCSs is a CSS framework that doesn’t provide a layout system but aims to take care of the rest, like:

• fonts & font-sizes
• paddings
• margins
• colors,
• tables & lists
• headers, blockquotes and what more..

SenCSs has support for forms which helps presenting them nicely (better form support is on the way).

There are also styles for elements like errors, warnings or success messages which are parts of a standard web application.

SenCSs, although being fresh & currently in development, is a nice base to start with & improve depending on your needs.