Kimai is a free and open source time tracking software which tracks your work time and prints out a summary of your activities on demand.

This time tracking software can be used as a web service or as a standalone software. It is lightweight and works with all major browsers. Kamai is multi-lingual and easily theme-able.

Aptana RadRails 2 is a free, open source and professional integrated development environment (IDE) for Ruby and Ruby on Rails applications.

It includes extensive capabilities to build Ruby and Rails applications in addition to support for HTML, CSS and JavaScript editing.

It comes with many features including support for project navigation, smart code assistance, visual debugging and structure outlining.

It comes as Standalone and Eclipse Plug-in Versions.

ShortPHP is a small, ultra-light weight and open source PHP web framework. The code is less than 4KB in size and currently is just under 100 lines.

In some ways you could say that it follows the MVC (Model-view-Controller) paradigm, but since it has no database-related code (it is 100% file-based) it’s more of a VC (View-Controller) – It’s up to the developer to use whatever tools he sees fit.

Guides are useful for laying out elements symmetrically, structure a design and improving the overall layout.

foxGuide is a firefox extension that displays horizontal and vertical guides in your firefox browser. Guides will appear as thin lines that float over the webpage. You can move or remove them just the way you do it Photoshop.

Okapi is an open source framework for building digital, generative art in HTML5. Okapi allows designers to create digital, generative art based on HTML5 Canvas that can be used in any compatible browser.

Since it is open source, developers can download Okapi’s source code and add your own creative functionality.

HTML5 is a set of web standards being developed by the Web Hypertext Application Technology Working Group.

The HTML5 standard includes many new features for dynamic web applications and interfaces. One such component being specified and implemented is the video element.

MooPlay is a MooTools plugin which brings useful controls over an html5 video element to help you build and customize your own HTML5 Video Player.

Few notable features:

• An interactive play progress slider
• A load progress bar
• Subtitles loaded through an ajax request and synchronized with the video.
• Full screen supported

The video element methods can be called by other scripts, MooPlay objects will adapt themself to any state changes.

XUI strives to be a framework for first class mobile device browsers such as Safari, Fennec and Opera with future support under consideration for IE Mobile and Blackberry.

It is a lightweight, dead simple, tiny, super modular JavaScript framework for building mobile web applications. XUI contains code for easy DOM manipulation, CSS, eventing, and JSON.

CodeMirror is a JavaScript library that can be used to create a relatively pleasant editor interface for code editing.

It supports many popular languages including HTML, CSS, XML, PHP, Python, Ruby, Java.

Centage! is a Smart and Fluid CSS framework based on less.js – a JavaScript implementation of less css, and makes use of it’s advanced features like mixins, variables and nesting.

Centage focus on providing simple fluid layouts and does not use pixel values, everything expands and shrinks according to browser width.

It does not add anything to your xhtml markup and everything stays inside the CSS file.

HTMLform is an online form builder powered with a feature-rich WYSIWYG editor which helps users to create and customize HTML forms with ease.

HTMLform allows users to generate forms in any language and in any character set (100% Unicode). It is highly customizable and users can configure many options including tooltips, icons, clarifying notes, default values and aligned field groups.

HTMLform generates XHTML 1.0 strict compliant code that is compatible with all browsers.