Google Earth

"Google Earth puts a planet's worth of imagery and other geographic information right on your desktop. View exotic locales like Maui and Paris, as well as points of interest such as local restaurants, hospitals, and schools. Google Earth combines satellite imagery, maps, and the power of Google Search to put the world's geographic information at your fingertips. With Google Earth you can fly from space to your neighborhood--just type in an address and zoom right in, search for schools, parks, restaurants, and hotels. Get driving directions, tilt and rotate the view to see 3D terrain and buildings, save and share your searches and favorites and even add your own annotations."

iRad

"iRad is a DICOM workstation written in Cocoa for MacOSX. Using Quicktime, openGL, and mySQl iRad aims to provide an easy and efficient way to review medical images from CT, MRI, ultrasound, and other DICOM sources such as angiography and Nuclear medici. Includes mproved Integration with iRad database and Query/retrieve tool."

McHurricane

"McHurricane is a hurricane/storm tracking utility, covering the Atlantic Basin and Eastern Pacific including Hawaii, (13 degrees West to 174 degrees West Longitude, and 0 degrees to 48 degrees North Latitude). You can download storm advisories from the National Hurricane Center directly into McHurricane. Nine storms of 100 plots each may be open at one time. Storm plots can be added, deleted, or inserted. Track plot list is shown, and a selected plot's data may be individually displayed including distances to four custom user installed city locations. Maps and storm data may be printed, and map areas copied to the Clipboard. Preferences may be set for the default map, plot symbols, and storm-strength wind circles, 12 or 24 hour clock display and time zone identification, distances/speeds in nautical, statute, kilometer format, atmospheric pressure in inches of mercury or millibars, storm logs and tracks displayed in selectable matching colors, entry of four custom city locations, and various other launch and screen layout options."

MoonMenu

Discover a textual description of the moon's phase, the percentage of illumination, the moon's age in days, and the current lunation number. This is an application that can compute the lunar data for any given date. Registration for MoonMenu costs $12 after a few uses.