Catalog of Bright Open Clusters: from ARVAL observatory.
Catalogue of Open Cluster Data (5th Ed.): A computer readable catalogue of open cluster data compiled by Gosta Lynga, Lund Observatory
NGC 3532 - The Wishing Well Cluster NGC3532: Website dedicated to the open star cluster NGC 3532. Includes reference points and star chart.
The Pearl Cluster NGC3766: Dedicated to the Open Cluster NGC 3766. Contains general astronomical information including photos and star map.