JSpell is a server-based spell checker that allows you to spell check any HTML input field and form. It is i18n compliant and has dialogs for multiple languages available. It can be used to add spell checking capabilities to HTML forms on your Web site. This spell checker is compatible with JSP, ASP, CGI, PHP, Cold Fusion, Oracle Forms, etc.
Java iCal Group Scheduler enables several users to get together for a meeting, by using JICAL to translate their iCalendar files into their available free/busy time and post it automatically to your Web server. This project enables Ximian Evolution desktop users to book meetings with each other (and Outlook users) via a Web server storing their 'Free/Busy' information as specified in RFC2445. It works with Evolution, Korganiser, Apple iCal, and MS Outlook (for meetings), and enhances your workgroup and personal calendar views. Shell scripts for converting to various image formats are also included.
Lucane is a free groupware platform written in Java, designed with extensibility in mind. Some applications are bundled with the platform, like a peer to peer quick message service, client/server and peer to peer file sharing, shared drawing, multi-user chat, audioconf, forums, a shared calendar, and more. The platform as a whole provides easy development for your networked applications with an object based network protocol, client/server and peer to peer integration, user and groups management, internationalization, and more.
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.
Red-Piranha is a search system that can actually learn what you are looking for. It can be used as a Web page, command line, or XML-WebService, so it will work with most languages, including Java, Perl, C#/.NET, and PHP. It includes learning abilities for the Desktop/Internet search functionality. All feedback from the user is stored in (editable) XML and RDF, and is used by the system to improve the quality of searches.