Wine is an implementation of the Windows API on top of X and Unix. It does not require Microsoft Windows, but can use native Windows DLLs if they are available. It provides both a development toolkit for porting Windows source code to Unix as well as a program loader, allowing many unmodified Windows programs to run on x86-based Unixes.
fPic is a two-part project that aims at providing a replacement Picture class for command-line applications made with REALBasic. It is split into a dynamic library, manip.dylib, and an RB class, fPic. The dylib handles the heavy-lifting, while the fPic class provides a (more or less) seamless way for RB programmers to manipulate images in CLI applications.
CD Stack is an advanced CD ripping and encoding application. It features shortcuts for when you have a large number of discs to rip and allows precise control over MP3 encoding. It can optionally import songs into iTunes, complete with track information and cover art. It uses the LAME Encoder to encode MP3s. A Universal binary is available.
MPlayer is a movie and animation player that supports a wide range of codecs and file formats, including MPEG 1/2/4, DivX 3/4/5, Windows Media 7/8/9, RealAudio/Video up to 9, Quicktime 5/6, and Vivo 1/2. It has many MMX/SSE(2)/3Dnow(Ex) optimized native audio and video codecs, but allows using XAnim's and RealPlayer's binary codec plugins, and Win32 codec DLLs. It has basic VCD/DVD playback functionality, including DVD subtitles, but supports many text-based subtitle formats too. For video output, nearly every existing interface is supported. It's also able to convert any supported files to raw/divx/mpeg4 AVI (pcm/mp3 audio), and even video grabbing from V4L devices.
Comic Reader Pro is a program for displaying comic books in the cbr and cbz formats. It will also display any folder of JPEG images. It is designed to be fast, unobtrustive, uncluttered, and not get in the way of your viewing. You can auto-scroll your way through an entire comic using a single key or mouse button. You can adjust to a comfortable zoom level with smooth scaling, and when you come to a full page spread, simply hold the right mouse button down to snap out to full page view.