Google Browser Size

Google Browser Size is a visualization of browser window sizes for web sites. Enter a URL into the app, and the page is displayed behind an overlay showing the percentage of browser users who are able to view the visible portion, based on their browser’s available viewport size, and their display’s screen resolution. For example, the "90%" contour means that 90% of people visiting the site have their browser window open to at least this size or larger.

http://browsersize.googlelabs.com/

Zen Coding: Plugins for HTML and CSS hi-speed coding

Zen Coding is plugin for HTML editors that allows you to use shorthand to generate HTML. I twas created and supported by Sergey Chikuyonok for Aptana, TextMate, Coda and Espresso. It is based on JavaScript (for Aptana) or Python (the rest of all) script and using more advanced Zen HTML Selectors logic for building HTML.

The demo video below shows Zen Coding in action.

Via se on the htmlprototyping group

http://code.google.com/p/zen-coding/

Highcharts: Interactive JavaScript charts

Highcharts is a charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application. Highcharts currently supports line, spline, area, areaspline, column, bar, pie and scatter chart types. It works with either the jQuery or Moo Tools javascript frameworks and is free for non-commercial use. Commercial licenses are offered as well.

http://highcharts.com/

Protokit

NOTE: Protokit is no longer being developed, but is still available for you to poke fun at.

Protokit was an experimental project to develop a toolkit for creating HTML prototypes. It uses the following open source libraries and plugins: Blueprint, jQuery, jQuery UI, jQuery Templates, and iXEdit. More information about the included libraries and their licensing agreements can be found in theREADME file.

Version 0.1 was the preliminary version and is very rough. It provides the libraries and a rudimentary set of templates to get you started while I make this thing a bit more than the ugly half cousin to our beautiful wireframes. Use will require knowledge of XHTML, CSS, and jQuery.

Prototokit is no longer being developed, but you can view the prototype demo and documentation, or you may download version 0.1 here.