(The Bliki engine Wikipedia API now moved to http://code.google.com/p/gwtwiki ). Eclipse plugin: Converts Wikipedia syntax to HTML. Features: syntax highlighting, content outline&assist, templates, HTML preview&insert, Java/PHP link2wiki, PDF creation.
EDI-Knight is an integration and translation software focussing EDI (Electronic Data Interchange), CSV (Character Separated Values), and XML. There's a command line tool for batchprocessing as well as a Java/J2EE conformant API.
JLatex provides unified API, which is used to generate documents in LaTeX format. Framework consists of Java classes intented to provide 1:1 LaTeX features compatibility.