Writer2LaTeX and Writer2xhtml is a collection of converters from OpenDocument Format (ODF) to LaTeX/BibTeX, HTML+MathML and EPUB.
It is delivered as a standalone java library, as a command line application and as extensions for LibreOffice.
Voikko is a spell checking, grammar checking, morphological analysis and hyphenation system. Spell checkers are available for multiple languages, other features for Finnish only.
JStream is a stream manipulator based on plugin architecture.
Streams are manipulated via custom scripts (Java language).
JStream uses Java NIO for better performances.
With JStream, you can easyly create programs like : MD5Sum, TCP Redirector...