NASA launched Spacewalk Simulation (Download)

"The simulation that can be downloaded from this Web site can be used on PC, but not Macintosh platforms. The software lets users experience one of three spacewalks and select different camera views as astronauts perform tasks to replace parts of the telescope. The simulation is currently a Public Beta."

via nasa.gov

powered by DigitalSpace Corporation!

[DigitalSpace is an international corporation with a leading practice in virtual worlds for industrial design engineering, education and public outreach. Established in 1995, DigitalSpace produced some of the first Internet-based 3D "avatar" applications including virtual events and tradeshows, learning spaces for K-12 and college, corporate information sharing spaces, and virtual worlds for artists.

Since 2000 DigitalSpace has been engaged by contracts from Adobe, NASA, and other federal agencies and prime contractors to produce a variety of virtual environments for space mission design, training and to serve the learning needs of developmentally challenged children. To support these projects DigitalSpace has created Digital Spaces (DSS), a full featured, physics based open source framework for 3D simulation. DSS has been used for numerous space and Earth-based applications and is being adopted by a number of universities and independent research efforts.]