4 links
Encyclopedia Astronautica
astronautix.com
Comprehensive resource providing detailed articles on most space technology subjects and space flight history.
Indian Space Program
geocities.com
Brief overview the of Indian Space Exploration Program. Includes a chronology and description of programs.
Voyage to the Milky Way
pbs.org
Companion site to the PBS film. Mars missions, interactive speed timeline, and a look at where space exploration is taking us.