Visual Linb is an Ajax components library for building zero footprint Ajax browser applications that feel like desktop GUI applications. It contains the most popular Ajax components, such as panel, dialog, layout, menu, tabs, tree, tree grid, Drag&Drop, timeLine, events calendar, and supports all major browsers. Sigma Linb includes more than 50 components and useful classes. The conponents are purely built in XHTML, CSS, JavaScript and XML, which are industry standards compliant and therefore are compatible with all major browsers such as Internet Explorer, Firefox, Opera and Safari, and can be placed anywhere on the page. Sigma Linb is written in pure javascript codes, Seamless Integration with any server side solution, such as j2ee, .net, PHP, perl. Sigma Linb is designed by Object-Oriented technology. This makes .Net / Java / PHP programmers feel easier to get istarted with these components. Sigma Linb includes serveral layout components, which can be used to define the various areas in the web pages. The outcomes application could dynamically adjust to accommodate content at run-time with these layout components.