Dojo Toolkit is a modular open source JavaScript library designed to ease the rapid development of cross-platform, enterprise-grade web applications. It contains tools for manipulating and animating HTML and structured data, incorporating AJAX and Comet-style operations, and for providing an optimal end-user experience. Dojo Toolkit can be used to develop web, desktop and mobile applications.

Ext JS is a JavaScript web development framework that enables developers to create feature-rich, responsive, and customizable web applications. It provides a wide range of pre-built UI components, data manipulation tools, and advanced features such as grid and chart generation, drag-and-drop functionality, and integrated AJAX communication with servers. Ext JS requires a specialized skill set that includes knowledge of JavaScript, HTML, and CSS, as well as experience with the framework's API and developer tools.

FreeMarker is a Java-based template engine that allows for the separation of presentation and business logic in web applications. It allows developers to create templates that define the structure and layout of web pages, and then fill in the content dynamically based on data from the application. FreeMarker is popular in Java-based web applications, particularly those built using the Spring framework. Competency in FreeMarker involves expertise in Java, web development, and front-end technologies such as HTML and CSS.

JSON With Padding (JSONP) is a technique used to enable cross-domain communication between web servers and browsers. It allows a web page to request and receive data from a server in a way that bypasses the same-origin policy restrictions of web browsers. JSONP works by wrapping the JSON data within a function call and adding a callback parameter to the URL request, which returns the data to the web page for processing. It is commonly used in web applications and APIs to enable integration with third-party services.

Web 2.0 refers to the second generation of the World Wide Web, characterized by the shift from static web pages to dynamic and interactive content. This skill encompasses the use of social media, user-generated content, and collaborative platforms that facilitate communication and sharing among users. Knowledge of Web 2.0 is utilized to enhance online engagement, foster community building, and support the development of applications that prioritize user interaction and feedback. Understanding Web 2.0 principles enables the creation of more participatory and responsive web experiences.