AstroClock FX - Java
AstroClock FX displays seven clocks all on one screen!
This astronomy clock displays the current local & UTC date & time, a calendar, local & Greenwich sidereal times, and the Julian day. The menus include information for the current sun, moon, eclipses, ephemerides for all the planets, minor planets and comets. It also has three timers that can be run independently.
The algorithms used are based on Jean Meeus book "Astronomical Algorithms." Planet images are generated using the JParsec library - Tomas Alanso Albi.