Archaeological and Palaeoecological Reference Collections Online

Among the many useful pages at WikiArc/ The Wiki Archaeological Information Resource is:

Archaeological and Palaeoecological Reference Collections Online

As of today 22 April 2012), the list there includes the following categories and links:

ARCHAEOMETALLURGICAL
The National Slag Collection - UK, from the Historical Metallurgy Society

CERAMIC
CerAfIm: Céramique Africaine Imprimée 
The National Roman Fabric Collection: a handbook - UK, from the Museum of London
Worcestershire On-Line Ceramic Database - UK

FUNERARY
TOMBA - Tombs of Bronze Age and Early Iron Age Europe

GEOARCHAEOLOGICAL
Soil Analysis Support System for Archaeology

PALAEOECOLOGICAL - PLANTS
Digitale Zadenatlas van Nederland (Digital Seed Atlas of the Netherlands)
PalaeoBot.org - Macrofossils, Pollen, Phytoliths, Starch and Isotopes
Seed ID Workshop - from Ohio State University
Willcox Atlas of Archaeobotanical Seeds

PALAEOECOLOGICAL - INVERTEBRATES
Marine Bivalve Shells of the British Isles
National History Museum of Rotterdam Mollusks
Neogene Bryozoa of Britain 

PALAEOECOLOGICAL - VERTEBRATES
Anàlisi de FORmes d'Otòlits (AFORO) - Shape analysis of fish otoliths
Archaeological Fish Resource
Aves 3D - a three dimensional database of avian skeletal morphology
Virtual Zooarchaeology of the Arctic Project

PALAEOPATHOLOGICAL
Digitised Diseases

VARIOUS
Linnean Society Collections Online - various biological collections
Poggio Civitate Etruscan Excavation Finds Catalogue
Portable Antiquity Scheme Database