DataBind is a library to simplify the persistance of Java objects to a datastore. A data store may be a relational database, XML files, or any other type of datastore. Java objects which are persisted do not need to be modified in any way. The only requirement for persisted objects is that they have read and write methods for each field that you would like to persist and an empty constructor. The read and write methods are specified at deployment time in an XML file and thus can be any method (in other words they do not have to be getter and setter methods, although this is the preferred method signature.) DataBind also supports loading and storing collections of objects. Objects can be retrieved from the database using search elements to select a subset of the available objects.
mod_log_sql (formerly known as mod_log_mysql) is an Apache module that enables access logging to an SQL database. This capability can replace or coexist with Apache's regular text-file logging mechanisms. The currently supported database backend is MySQL, with PostgreSQL and others in development.
OpenIM is a Java implementation of a Jabber server. It is a complete rewrite of the Jaba Server project, and it supports the Jabber server to server communication protocol. It also supports Presence, Message, and Roster. Persistent storage is done in an XML file using XStream lib. It has been tested successfully with many clients such as Exodus, Rhymbox, GAIM, Psi, Greenthumb, and the Kopete.
Jakarta Slide is a content management system composed of multiple modules tied together using the WebDAV protocol. It includes a content management system with a Java API, a servlet implementing the WebDAV protocol on top of the content management system, a Java WebDAV and HTTP client library, and a WebDAV command line client.
The POI project contains several components for dealing with popular OLE 2 formats in Java. POIFS is a pure Java implementation of the OLE 2 Compound document format. HSSF is a pure Java implementation of Excel 97-2003 XLS file format based on POIFS. HSSF Serializer is a pure Java serializer for Cocoon 2 that uses the Gnumeric XML format to output XLS. Full documentation of the POIFS file format is included. It is useful if you wish to output reports in the Excel file format, or if you have existing XML documents that you need to get into Excel. HSLF provides initial support for PowerPoint 97-2003 and HWPF provides limited support for Word 97-2003. POIFS can be used to read any OLE2 stream.