Groups and Permissions ("GAP") is the name given to 2 related frameworks that grew out of the effort to write an authorization service for uPortal. The groups framework presents an API for querying and maintaining a system of grouped entities. It is a "lower level" API that can be used to support a variety of activities including authorization and managing arbitrary collections of things, like buddy groups or address lists. By contrast, the permissions framework presents a simple API to do one thing: authorization. Its reference implementation makes use of the groups API....

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Rio is an open source technology that provides a dynamic architecture for developing, deploying and managing distributed systems. Rio provides QoS based management for distributed systems, providing a policy based approach for fault detection and recovery, scalability and dynamic deployment. Key to the architecture are a set of dynamic capabilities and reliance on policy-based and Quality of Service mechanisms....

SISC is an extensible Java based interpreter of the algorithmic language Scheme. SISC uses modern interpretation techniques, and handily outperforms all existing JVM interpreters (often by more than an order of magnitude).

In addition, SISC is a complete implementation of the language. The entire R5RS Scheme standard is supported, no exceptions. This includes a full number tower including complex number support, arbitrary precision integers and floating point numbers, as well as hygienic R5RS macros, proper tail recursion, and first-class continuations (not just the escaping continuations as in many limited Scheme systems). SISC also attempts to implement the standard as correctly as possible, while still providing exceptional performance....

Kaffe is a clean room implementation of the Java virtual machine, plus the associated class libraries needed to provide a Java runtime environment.

Quercus is a 100% Java implementation of PHP 5. It allows for tight integration of Java services with PHP scripts, so using PHP with JMS or Grails is a quick and painless endeavor.

With Quercus, PHP applications automatically take advantage of Java application server features just as connection pooling and clustered sessions....

The Sweble Wikitext Parser is a parser for the wiki markup (called Wikitext) used by the MediaWiki wiki engine. Of course, the MediaWiki software provides its own parser for wikitext, however, the parser only produces HTML output. The Sweble Wikitext Parser on the other hand generates a machine-readable representation (AST - abstract syntax tree) of an article, thus unlocking the structured data within a wiki running the MediaWiki software....

The Woden project is an Apache Web Services Project to develop a Java class library for reading, manipulating, creating and writing WSDL documents, initially to support WSDL 2.0 but with the longer term aim of supporting past, present and future versions of WSDL....

Estúdio Livre is the back end of the portal:

http://estudiolivre.org

it uses Tiki (https://www.ohloh.net/p/tikiwiki) as a base but enhances it with a lot of personalized code to allow for the use of Ajax interfaces, to create a free multimidia archive and to integrate with an icecast streaming server. Polvo is a sub-project that allows for seamless integration with Tiki's codebase....

An upcoming server/client software, written from the ground up (not a server mod like CraftBukkit). It is not focused on Minecraft; focusing instead on a general framework for voxel-based games.