Apache Sling is a Web application framework based on REST principles that provides easy development of content-oriented applications. Sling uses a JCR repository, such as Apache Jackrabbit, as its data store.

Sling graduated from the Apache Incubator on June 17th, 2009, and is now an Apache top-level project....

Spark is an Open Source, cross-platform IM client optimized for businesses and organizations. It features built-in support for group chat, telephony integration, and strong security. It also offers a great end-user experience with features like in-line spell checking, group chat room bookmarks, and tabbed conversations....

Xapian is an Open Source Search Engine Library, released under the GPL. It's written in C++, with bindings to allow use from Perl, Python, PHP, Java, Tcl, C#, Ruby, Lua and Erlang (so far!)

Xapian is a highly adaptable toolkit which allows developers to easily add advanced indexing and search facilities to their own applications. It supports the Probabilistic Information Retrieval model and also supports a rich set of boolean query operators....

OpenLaszlo is an open source platform for creating zero-install web applications with the user interface capabilities of desktop client software.

Terracotta provides clustering for Java applications. Features include:

- High level replication
- Cross JVM coordination
- Large virtual heaps
- Fine-grained changes
- Runtime management and control
- No serialization

The JTS Topology Suite is an API of 2D spatial predicates and functions. It has the following design goals:

• JTS conforms to the Simple Features Specification for SQL published by the Open GIS Consortium
• JTS provides a complete, consistent, robust implementation of fundamental 2D spatial algorithms ...

The Jakarta-ORO Java classes are a set of text-processing Java classes that provide Perl5 compatible regular expressions, AWK-like regular expressions, glob expressions, and utility classes for performing substitutions, splits, filtering filenames, etc. This library is the successor to the OROMatcher, AwkTools, PerlTools, and TextTools libraries originally from ORO, Inc....

Mule is an ESB (Enterprise Service Bus) and integration platform. It is a scalable, highly distributable object broker that can seamlessly handle interactions with services and applications using disparate transport and messaging technologies.

Apache Shiro is an easy-to-use application security framework that cleanly handles authentication, authorization, enterprise session management and cryptography.

Our mission: To provide the most robust and comprehensive application security framework available while also being very easy to understand and extremely simple to use....

The CAS Server is a Java-based enterprise single sign on solution. Client support includes Java, PL/SQL, Apache, PHP, Perl and more.