Stratigraphy.Net aims to provide free and open access to geoscientific information and data with special emphasis on the disciplines stratigraphy, paleontology and sedimentology:
Snet offers open access to interesting data for geologists and other earth scientists. Search the agenames index of stratigraphic terms, and TaconConcept, a taxonomic catalogue offering synomymies and descriptions of various taxonomic groups such as foraminifers, gastropods as well as ammonites.
Stratigraphy.net is in the Geoblogosphere! Find news we blog about at Stratigraphy.net internals as well as an update of the complete Geoblogosphere we offer at geobulletin
Some interesting resources for developers as well as an overview of projects Snet has finished so far can be found here
Stratigraphy.net's mission statement and some more information about the people involved with Snet.