Krumo is a php plugin to replace built-in debugging function in PHP, print_r() and var_dump(). Krumo doesn’t replace these functionality but only help us presenting readable debugged information such as PHP variable, declared class, predefined variable ($_POST, $_GET, $_SESSION, $_SERVER), etc.

Krumo not just give us readable debugged information in collapsible DHTML tree and nice CSS looks but also give us information code line information that its function was called, so we can keep track the origin of each dump you see on the screen.

Try how Krumo works at its own homepage and download Krumo at sourceforge.net.

Modernizr is a JavaScript library that helps you use the features in either CSS3 or HTML5 in order to easily control the fallbacks on browsers which not support those features. In other words, you can be flexible in using the HTML5 elements such as , and without being bothered those elements won’t run appropriately on the Internet Explorer.

The mechanism of Modernizr is to make self-titled JavaScript object containing properties for every feature. If the browsers supports the property, it will evaluate true, if it doesn’t, it will be false.

We would like to underline that this plugin doesn’t add any feature which is not available on browser, but rather detect its native availability. Then it offers you an alternative to use the feature on that browser according to its ability that has been detected before. Now you can try this smart Modernizr by downloading it here.

Speed Tracer is a Google Chrome extension that helps you identify and fix performance problems in your web applications. This tool can help you to be able to get a better picture of where time is being spent in your application including JavaScript parsing and execution, layout CSS style recalculation and selector matching, DOM event handling, XHR Request callbacks, etc.

You can get start to use Speed Tracer here and see some example here.

Smush.it is an image optimization tool with optimization techniques for specific image format. It removes unnecessary bytes from image files without changing the image look or reducing visual quality.

You can try Smush.it on its homepage, besides minimizes image files they also gives report how many bytes that has been saved. Nice tool