Eloquent is a powerful Bible study tool for Mac OS X, supporting features such as services, to access the Bible in any program. It uses the Sword Library to work with bible texts, commentaries, dictionaries.
PDFView is a simple, yet powerful, Mac Os X PDF viewer, with advanced integration with LaTeX.
Dry Dock for Oolite was a tool for manipulating ship models for the open source Elite clone Oolite. It does not work on modern systems.
Screen Grabber 2.0 is an application for grabbing screen shots at even timeintervals from a movie. Useful for creating previews, and thumbnails.