I(2) Drive is an online storage solution that allows personal and corporate users to manage their important information from anywhere. It provides client and server software for accessing and sharing files through a Web interface and WebDAV clients either as a hosted service or an in-house install.
JSPWiki is a JSP-based WikiWiki clone. It supports all the standard Wiki features, including attachments, full UTF-8 support, templates, and page locking. It also supports an XML-RPC API for scripting, Weblog functionality, Atom and RSS feeds, WikiForms, spam filtering, in-page CSS, and very fast searching using Lucene. Most functions are served by plugins, so you can develop your own extensions.
LibreSource is a versatile collaborative platform and software forge. It is adapted to the collaborative software development, groupware, community leading, e-archiving and Web publishing. On a single server, LibreSource can host several projects, several groups of users, and grant fine-grained access to the resources. Based on Java/J2EE technology, it is a modular Web server that users can customize online by combining resources and rights: wiki pages, forum, trackers, synchronizer, subversion, files, download areas, a dropbox, forms, etc.
Morcego is a 3D graph browser for viewing and navigating any graph-like structure. Examples of such structures include social networks, site maps, hierarchies, and genealogy trees. It currently only support simple graphs. It's already integrated into TikiWiki. Morcego is not meant to provide a solution for the end user, but to be embedded in a Web application by developers. It's a Java applet that communicates with an XML-RPC server to load the graph that is displayed.
GroupServer is a Web-based mailing list manager designed for large sites. It provides email interaction like a traditional mailing list manager but also supports reading, searching, and posting of messages and files via the Web. Users have forum-style profiles, and can manage their email addresses and other settings using the same Web interface. It has supports features such as Atom feeds, a basic CMS, statistics, multiple verified addresses per user, and bounce detection, and is able to be heavily customized.
Insurrection is a Web interface and RSS and Atom feed generator for Subversion that uses modern browser features while being as browser agnostic as possible. It has some repository rights administration features and a reasonably good-looking interface that can be customized. RSS and Atom feeds of updates to the project are available.
eZ calendar is an eZ publish 2 module that provides an advanced Web based calendar application. It supports recurring events, comments, groups, types, categories, priorities, status, comments, files, links, sorting, month, week, day, and year views, tooltips, JSCalendar date selection, and new design templates. It features very flexible security and supports permissions on the groups that can view, add, edit, and delete events.