In the light of these characteristics, the choice of software is a little more restrictive than in the PC world. On the one hand, because of the low computing power and on the other hand, because it is an ARM architecture with a lot of disadvantages : No auto-detection of the material, some binary opaque, a part of the specification, kept secret...
The Foundation offers two GNU/Linux distributions that are specially compiled for this computer. Fedora 13 (version 15 is expected soon) and Debian 6. If such distributions are free, it should be noted that the part bootloader and the entire GPU (OpenGL and video acceleration) will be provided in binary form and remains owner.
These system images are downloadable through torrents or direct link with http.
What you get with the Raspberry Pi.
To get costs down, the Raspberry Pi is devoid of power button. Ignition and extinction will be so in (UN) plugging the power cable that is also not delivered. Anyway, it was not enough to start an SD card not supplied is required for the boot operating system.
Need to insert a SD card on which you will have copied one of the images available for download. For convenience, the Foundation also offers the sale of pre-installed maps. The 10 000 first Raspberry Pi will be delivered naked, devoid of housing.
However, the addition of a box is planned for the next deliveries.