libxmldiff is a library to provide diff functions for XML files. It is shipped with xmldiff, a simple command line tool to demonstate libxml functionnalities. See the project xmltreenav for a GUI.
NOTE: The library code compatible with audacity has migrated to
https://github.com/claytonotey/libsbsms
A subband sinusoidal modeling library/command line tool/gui for time stretching and pitch scaling audio. Download the sbsms package for the source or the win32/mac wxSBSMSPlayer package for the gui binaries.
JFtpSync is for uploading web content to a server via FTP. It is designed to do FTP uploading only, and do it well, offering recursive uploading of content filtered by file type. It is primarily a command-line tool but there is a Java GUI as well.
A Java library to build aplications operating on Rational's ClearCase VOBs. It is built around the command line tool cleartool and tries to encapsulate all the actions and messages, like versioning elements, creating and aplying labels, GUI to VOBs, etc.
JarBoy is a archive/packaging tool, which helps to manage, create and explore JAR archives. It could be used as command-line tool, java library or classical GUI application.