Sourceforge.net is a repository of free open source software, including stuff for business. Portals Magazine compiled the list below of the top 10 most popular Web 2.0-related applications available on the site. I am not sure of their criteria as these choices do not correspond to the Sourceforge community awards or the most downloaded ones. Perhaps these choices have changed since the Portals people did their research in November.
Even though I just learned about it, Sourceforge is not a secret. There were 136,923 registered projects and 1,460,448 registered users in mid-December. They also said they are hiring so check them out. The enterpise winner in the community awards was Zimbra Collaboration Suite – “An Open Source server and client technology for next-generation enterprise messaging and collaboration.” Not all the software is free. IBM is selling their software such as this IBM WebSphere Application Server Community Edition V1.1 based on Apache Geronimo. But that’s okay.
Here is the Portals Magazine Top Ten. They all look useful to Web 2.0 developers but with the exception of one or two they look beyond the normal business user.
qooxdoo is an advanced open-source JavaScript-based GUI toolkit. It continues where simple HTML leaves off. This way qooxdoo can help you implement your AJAX-enhanced web 2.0 application.
Pligg CMS is a Web 2.0 Content Management System (CMS). The user interface invites participation and gives visitors a reason to come back to your site by making them decide on the site's content and giving them the chance to build a social network.
BMForum: "BMForum is a open source forum based on PHP & MySQL. BMForum is a powerful forum with AJAX, Tags, RSS and more Web 2.0 Technology."
Plottable Tagboard System: "A tagboard (shoutbox) script written in PHP and uses MySQL as a backend. Features Web 2.0 AJAX features. Currently still in BETA."
Message Board Software: "NextBBS lets you create your own Community with unrivaled ease of use.” It claims to offers the most 'Web 2.0' experience currently available (whatever that means – you have to see it to know what they mean).
AjaxFTP: "A flexible widget to incorporate into your web 2.0 app to allow FTP access through a browser. AjaxFTP lets you browse, upload, and download files from remove servers using only Javascript and PHP. Built with customization in mind."
Scriptio: "Scriptio is a framework for presenting animations and educational content in a rich online experience. Featuring an easy-to-learn scripting language for fast prototyping and production-quality development, Scriptio is designed for Web 2.0 applications."
Atomic OS: "Atomic OS is a responsive Web 2.0 operating environment & development platform. Based on AJAX techniques, it emulates/provides standard operating system features including a command-line shell, interpreter, filesystem, database access and GUI services."
jsTracer: "jsTracer is a simple yet feature rich JavaScript logging and debugging tool. It is especially useful for debugging what has been coined 'Web 2.0' code."
NOAGrid: "A framework for Grid Computing using thin clients. The framework will support web browsers as clients, mainly Microsoft Internet Explorer and Mozilla. Utilizing newest web technologies - Web 2.0, Ajax (to the extreme..)"
Let me know if you have tried any of these and how they worked.