Belgian congo stamps - www.congoposte.be
Catawiki Catalogue: organize your own catalogue online FOR FREE - www.catawiki.com/catalog
Fédération International de Philatélie - www.f-i-p.ch
Filatelie, Maandblad - www.defilatelie.nl
French stamps - www.philateliefree.fr
French stamps: ex-colonies, DOM, TOM - www.timbres-colonies-de-france.fr
Linn's stamp news - www.linns.com
My Stamp World: free online community - mystampworld.net
Nederlandse Vereniging voor Thematische Filatelie - www.nvtf.nl/index.php
Postzegelblog, online magazine - www.postzegelblog.nl
Stamp Link: The World's Hottest Stamp Collecting Sites - www.stamplink.com
Stamp World: the largest online stamp catalogue - www.stampworld.com/en/
Unusual Stamps - www.eryx.it/dentelli/index.htm
UPU: new issues, circulaires on inofficial stamps - www.upu.int
World stamp Catalogue (-1920) - www.catalogue.klaseboer.com