Planets is a fun, interactive program for many-body gravity simulations. The emphasis is on play: it's easy to add in planets, zoom in and out, change the physical constants, save and load configurations, etc. It's designed to be easy enough for a kid to enjoy, but that hardly precludes adults.
jAscom is a wrapper around the JACOB (JAva-COM Bridge) libraries for easy access to the ASCOM Platform 3.0 using Java. It provides all functionality (methods and properties) of the ASCOM Telescope API version 2. It also includes the Focuser and Dome API. This means easy and fast coding of Java applications for all sorts of telescope controlling problems, using a widely accepted standard.
The FLASH code is a modular, adaptive, parallel simulation code capable of handling general compressible flow problems in astrophysical environments. It has been designed to allow users to configure initial and boundary conditions, change algorithms, and add new physical effects with minimal effort. It uses the PARAMESH library to manage a block-structured adaptive grid, placing resolution elements only where they are needed most. It uses the Message-Passing Interface (MPI) library to achieve portability and scalability on a variety of different message-passing parallel computers.
BOTEC is a simple but useful calculator that assists with astrophysical, orbital mechanics, and space navigation calculations. It is a "back-of-the-envelope calculator" rather than an industrial-strength calculator, although this may change in the future. It is primarily intended for people familiar with physics and Python, and as such is unlikely to be useful to the average end user. It includes solar system data, and all values are strictly in SI units.
Mars MOLA Viewer displays a fly-over rendering of the Martian surface, as measured by the Mars Global Surveyor, in real-time 3D animation. It downloads the Mars Orbiting Laser Altimeter topographic data files and uses them to drive the rendering. The user controls the position and the angle of the camera, and can move seamlessly over the entire Martian surface from -88 to 88 degrees latitude. It is a Java Web Start program with 1-click installation from your browser (depending on platform/browser).