Globular Star Clusters
Information from SEDS on globular clusters.
http://www.seds.org/messier/glob.html

The Globular Cluster Group at Leeds University
Introductory information on globular clusters, a diagram of their distribution in the galaxy, information about their research.
http://ast.leeds.ac.uk/globulars.html

Catalogue of Variable Stars in Globular Clusters
A catalogue of variable stars in globular clusters, featuring, for each cluster, single variables listed with pulsational parameters (period).
http://www.astro.utoronto.ca/~cclement/read.html

Databases of Padova Astronomy Department
.
http://dipastro.pd.astro.it/globulars/databases/databases.html

Catalogue of Milky Way Globular Cluster Parameters
This catalog contains basic parameters on distances, velocities, metallicities, luminosities, colors, and dynamical parameters for 147 objects regarded as globular clusters in the Milky Way galaxy. Compiled by William E. Harris, McMaster University.
http://physun.physics.mcmaster.ca/Globular.html

A Galactic Globular Clusters Database
Searchable database of galactic globular clusters parameters. Clusters have colour-magnitude diagrams and Digital Sky Survey images.
http://www.mporzio.astro.it/~marco/gc/