Based on the popular and very useful mod_rewrite for apache, UrlRewriteFilter is a Java Web Filter for any J2EE compliant web application server (such as Resin, Orion or Tomcat), which allows you to rewrite URLs before they get to your code. It is a very powerful tool just like Apache's mod_rewrite....

Shindig is an OpenSocial container.,

Application for Mind Mapping, Knowledge Management, Project Management. Develop, organize and communicate your ideas and knowledge in the most effective way using this redesigned version of well known FreeMind created by one of its key developers.

Activiti is a Business Process Management (BPM) and workflow system targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process engine for Java. It's open-source and distributed under the Apache license. Activiti runs in any Java application, on a server, on a cluster or in the cloud. It integrates perfectly with Spring, it is extremely lightweight and based on simple concepts....

The ever growing paradigm of enterprise application convergence that bundles web, search, document, social and portal capabilities into a single, easy-to-access and modular solution is leading organizations to expect nothing less than rich and “content smart” application to drive their business....

Jackson is a Streaming, Fast, Conformant, Open Source JSON processor (parser, generator, data binder).

Jackson supports all typical access methods to JSON content, including:

• Ultra-high performance streaming (incremental) parser
• Convenient Tree Model...

Errai offers a set of components for building rich web applications using The Google Web Toolkit. The framework provides a unified federation and RPC infrastructure with true, uniform, asynchronous messaging across the client and server.

Centreon is a network, system, applicative supervision and monitoring tool, it is based upon the most effective Open Source monitoring engine: Nagios. Centreon provides a new frontend and new functionalities to Nagios.

It allows you to be more efficient in your network monitoring, but also allows you to make your supervision information readable by a largest range of users. Indeed, a non technical user can now use the Centreon/Nagios couple to easily understand your network infrastructure thanks to charts and graphical representations of the gathered information. Skilled users still have access to specific and technical information collected by Nagios though....

Nutch is a search engine based on Apache Lucene.,

Jitsi (previously SIP Communicator) is a cross-platform VOIP, videoconference, desktop sharing and chat client.

Protocols supported include SIP, XMPP/Google Talk/Jabber/Facebook chat, AIM/ICQ, Windows Live, Yahoo! Messenger and Bonjour.

Other features include: Call recording, Call & chat encryption, Noise suppression, Echo cancellation, File transfer, multi-user chat, Desktop streaming, Presence, Conference calls, Integration with Microsoft Outlook and Apple Address Book, Support for LDAP directories, Support for Google Contacts, On-line provisioning, Systray notifications, IPv6 support, Spell checker and many more....