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Prototip allows you to easily create both simple and complex tooltips using the Prototype javascript framework.

This article presents a JavaScript component which renders a tree on the screen using VML (Vector Markup Language) in Internet Explorer 6+ or the <canvas> element in Firefox 1.5+.

Mydows is a small library of javascript functions that sit above the Prototype Javascript library and aid in the creation and management of free floating windows contained within the webpage. Mydows will also work with the Scriptaculous library for added features.

Growler is a PrototypeJS based class that displays unobtrusive notices on a page. It works like the OS X Growl. It supports themes by using CSS styling. Also options can be passed to modify how long the notice is displayed or whether it remains displayed until the user closes it.

Shadowbox is a cross-browser, cross-platform, cleanly-coded and fully-documented media viewer application written entirely in JavaScript. Using Shadowbox, website authors can display a wide assortment of media in all major browsers without navigating away from the linking page.

What about the case where most products don’t have offerings, or the offerings don’t have merchants, vel cetera? If this were a frequent case, and this were inner-loop code, I might introduce a global empty object in order to reduce the object instantiation overhead (which happens right away) and the GC load (which shows up over time). E.g. define var $N={}, and use: var product = ..., merchantName = (((product||$N).offering||$N).merchant||$N).name; if (merchantName) displayMerchantName(merchantName);

OMeta is a new object-oriented language for pattern matching. It is based on a variant of Parsing Expression Grammars (PEGs) which we have extended to handle arbitrary data types. OMeta's general-purpose pattern matching facilities provide a natural and convenient way for programmers to implement tokenizers, parsers, visitors, and tree transformers, all of which can be extended in interesting ways using familiar object-oriented mechanisms.

JNEXT is an open source (triple MPL, GPL, LGPL license), small footprint, cross platform and cross browser framework for extending Web browser Javascript (for more background and motivation check this blog entry). With JNEXT it is possible to utilize existing Web browsers to host full and self contained applications that do not depend on external Web servers for the application logic (although they are free to make use of them). This is acheived by enabling Javascript controlled access to the full range of native operating system resources (such as TCP/UDP sockets, files, databases, threads etc).

XRAY is a bookmarklet for Internet Explorer 6+, and Webkit and Mozilla based browsers (including Safari, Firefox, Camino or Mozilla). Use it to see the box model for any element on any web page.