GagaFactory (http://www.gagafactory.com/GagaMarkets/) has released
GagaMarkets, a real-time visual market index monitor for Mac that
shows you which way the markets are going in a glance. GagaMarkets
monitors stock indices in 30 countries.

Users can choose which index to monitor in each country, and
GagaMarkets’ color-coded display shows whether the markets are rising
or falling, skyrocketing or plummeting. With a 2D or 3D display,
showing either a world map projection or a rotating globe,
GagaMarkets displays, on the Desktop, whether the markets are bullish
or bearish.

GagaMarkets is free, but registration is required. The app requires
Mac OS X 10.4 or later and is available in 10 languages.