Canadian meteorite catalogue

http://www.geo.ucalgary.ca/cdnmeteorites

Catalogue of galactic supernova remnants

http://www.mrao.cam.ac.uk/surveys/snrs

The galaxy catalog

http://www.astro.princeton.edu/~frei/catalog.htm

Extra-solar planets catalog

http://www.obspm.fr/encycl/catalog.html

Johnston's Archive Astronomy and Space

http://www.johnstonsarchive.net/astro

Known planetary systems

http://www.princeton.edu/~willman/planetary_systems

The NGC on the net

http://www.seds.org/billa/ngc.html

The NGC/IC project

http://www.ngcic.org

The VizieR catalog service

http://vizier.u-strasbg.fr