General Myrmecology
AntWiki (Antwiki provides a wealth of information on the world's ants. Contributions come from ant experts together with discussions provided by experts and amatuers.) link
AntWeb (AntWeb is the world's largest online database of images, specimen records, and natural history information on ants. It is community driven and open to contribution from anyone with specimen records, natural history comments, or images.) link
AntMaps (The goal of antmaps.org is to provide an intuitive and efficient framework for professional and amateur myrmecologists to visualize the known distribution of ant species or higher taxon, and to access the underlying records for those data.) link
Hymenoptera Online (HOL) (The order Hymenoptera contains some 115,000 species and millions of specimens in collections around the world. Our goal is to provide access to these data.) link
FORMIS Bibliography (FORMIS is a composite of several ant literature databases. It contains citations for a large fraction of the world's ant literature (over 60,000 references). link
Other interesting links
Museum Specimen Preparation Guidelines (incl. Vouchers) by J. Heraty, D. Yanega, S. Triapitsyn link
Preservation and Curation of Insects (by BugwoodWiki - Center for Invasive Species and Ecosystem Health at the University of Georgia.) link
Ants: Standard Methods for Measuring and Monitoring Biodiversity link