Web browsers are the most commonly used type of HTTP user agent. Although browsers are typically used to access the World Wide Web, they can also be used to access information provided by web servers in private networks or content in file systems.

A Wiki engine is a software that makes a Wiki system work. It's responsible for converting requested pages from raw text to HTML for users to view and supports edit operations. Generally, multiple authors can easily modify the content of web pages created with a wiki engine using a common web browser. Wiki engines can be used in combination with a personal web server to organize personal information. They are implemented as server-side scripts and can run on one or more servers. The content can either be located on the server’s side file system or stored in a relational database management system.

Web Servers are software applications that work as a daemon serving web documents.

Programs that download, parse and display RSS (and ATOM) news feeds

A online social network (also named virtual community or online community) is a group of people that may or may not primarily or initially communicate or interact via the Internet. Online communities have also become a supplemental form of communication between people who know each other in real life. A social network service is social software specifically focused on the building and verifying of online social networks for whatever purpose. Social network software and services include usually features like mailing lists, blogs, wikis, e-mail, messaging, photo sharing, video sharing, games and forums.

Portal Tools should give their users the ability to produce and publish both enterprise portals and portlet applications. These tools usually combine wizards and editors to assist the users through the whole process of developing portals and portlet applications.

A blog is a journal that is available on the web. The activity of updating a blog is "blogging" and someone who keeps a blog is a "blogger" . Blogs are usualy updated daily using software that allows people with little or no technical background to update and maintain the blog. It is a user-generated website where entries are made in journal style and displayed in a reverse chronological order. Blogs often provide commentary or news on a particular subject, such as food, politics, or local news; some function as more personal online diaries. A typical blog combines text, images, and links to other blogs, web pages, and other media related to its topic.

A content management system (CMS) is a application used to create, manage, archive and remove of information resources from an organized repository. Includes tools for publishing, format management, revision control, indexing, search and retrieval.

E-commerce consists primarily of the distributing, buying, selling, marketing and servicing of products or services over electronic system such as the Internet and other computer networks. An electronic business application aimed at commercial transactions and can involve electronic funds transfer, supply chain management, e-marketing, online marketing, online transaction processing, electronic data interchange (EDI), automated inventory management systems, and automated data collection systems. E-commerce software typically provide a means of capturing a client's credit card information, but they rely on the software module of the secure gateway provider, in conjunction with the secure payment gateway, in order to conduct secure credit card transactions online.

Electronic mail (abbreviated "e-mail" or "email") is a store and forward method of composing, sending, storing, and receiving messages over electronic communication systems. The term "email" applies both to the Internet email system based on the Simple Mail Transfer Protocol (SMTP) and to intranet systems allowing users within one organization to email each other. Both plain text and HTML are used to convey email. While text is certain to be read by all users without problems, many users feel that HTML-based email has a higher aesthetic value. Advantages of HTML include the ability to include inline links and images, set apart previous messages in block quotes, wrap naturally on any display, use emphasis such as underlines and italics, and change font styles. HTML emails often include an automatically-generated plain text copy as well, for compatibility reasons. An e-mail client, also called a mail user agent (MUA), is a computer program that is used to receive and send e-mail.

A Discussion Forum (a.k.a. forum, discussion board) is an online service that allows registered users to post questions and responses to other posted questions. Is a facility on the World Wide Web for holding discussions and posting user generated content, or the web application software used to provide the facility. A forum is essentially a website composed of a number of member-written threads. Each thread entails a discussion or conversation in the form of a series of member-written posts. These threads remain saved on the forum website for future reading indefinitely or until deletion by a moderator. However, forum software can be considerably more advanced and include features like polls, user profile, private messaging, feeds, e-mail notifications, HTML editor, image sharing.

Collaborative software is software designed to help people involved in a common task achieve their goals. Collaborative software is the basis for computer supported cooperative work. Such software systems are group calendaring applications, integrated collaborative environments and team collaborative applications.

Finally MySpace launched its Apps Space!

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