TwistedWave is a very easy-to-use and powerful audio editor. It supports Audio Unit plug-ins and many file formats, including wav, aiff, caf, mp3, mp4, FLAC, and Ogg Vorbis. It has good multichannel support, so you can apply Audio Units to a selection of channels. It supports unlimited undo and redo, which work instantly. Zooming in and moving around the waveform is very fast, even with very large files. All the effects are applied in the background, saving a lot of time.
BluetoothSender sends files over Bluetooth to paired devices using OBEX Object Push from the command line. It is created to allow automated/scriptable sending of files to Bluetooth devices. This utility is intended for embedding in scripts and has no user friendly graphical interface.
Sc21 is a MacOS X framework for integrating the Coin high-level 3D framework into Cocoa applications. The combination of Coin and Sc21 (pronounced "Scandium", like the element) makes it possible to create native, high-performance 3D graphics application on MacOS X based on the industry standard Open Inventor API. Sc21 is written in Objective-C++ and comes as a Mac framework bundle. It also includes a custom Interface Builder palette which lets developers drag and drop the most important components into their project.
StepMenus enhances the user experience in OS X by providing a NeXTSTEP-style applicaiton menu for Cocoa applicaitons. The current application's menu is displayed in a compact floating window that can be repositioned wherever is most convenient. It is great for multi-monitor setups since you no longer have to move the cursor (and your attention) to the main monitor to access the menu for a window on your secondary display.
Mr.Java is a Java IDE that is one step above a command line interface, but not quite as confusing as an IDE. It will compile for you, add libraries to your class path, and run the whole thing, with three simple buttons. Drag a library or Java source file over the window, and it will be put in the right folder. When running programs, the stout is written to a file cleverly named “stdout”, and the std err is cleverly written to file named - you guessed - stderr.