XWiki is a WikiWiki clone written in Java that supports many popular features of other Wikis like the Wiki syntax, version control, attachments, security, and searching, but also many advanced features like templates, database and dynamic development using scripting languages (Velocity, Groovy, Ruby, Python, PHP, and more), an extension system and skinability, J2EE scalability, an XML/RPC remote API, statistics, RSS feeds, PDF exporting, WYSIWYG editing, an Office viewer and importer, and a lot more.
trojuhelnik is a general solver for triangles. It computes all possible solutions for a triangle that is specified by an arbitrary triple of the following elements: sides, angles, altitudes, medians, angle bisectors, area, radius of circumscribed and inscribed circle, sum a+b, perimeter and difference of the angles. All other elements, triangle visualization, and graphs of elements dependencies are also available.
LogicalDOC is a Web-based document management system that is easy to use and learn. Its architecture leverages best-of-breed Java technology to achieve a powerful and flexible solution. It supports its users with a powerful search engine (Lucene), Web service interface (JAX-WS via CXF) compatible with .NET and PHP, versioning, annotation on documents, a WebDAV interface, importing and exporting from .zip files. Documents can be organized into hierarchical folders, searched using the integrated search engine, or browsed by Tag. The system is extensible thanks to the technologies used (Spring-Hibernate) and its plugin architecture.
MyJSQLView provides an easy-to-use Java based GUI frontend for viewing, adding, editing, or deleting data in the Apache Derby, H2, HSQL, Microsoft SQL, MSAccess, MySQL, Oracle, PostgreSQL, and SQLite databases. A query frame allows the building of complex SQL statements and SQL Query Bucket for saving such. The application allows easy sorting, searching, and import/export of table data. A plug-in framework allows inclusion of tools to visually build queries, profiles, and plot data for analysis.
Jitsi (formerly SIP Communicator) is an audio/video and chat communicator that supports protocols such as SIP, XMPP/Jabber, AIM/ICQ, Windows Live, Yahoo!, Bonjour, and many other useful features. It is currently the most feature rich Internet Communicator, and is the only one to provide encrypted audio/video calls, desktop streaming and sharing, and chat on Windows, Mac OS X, and Linux with both the SIP and XMPP protocols.