ChemSpider

ChemSpider http://www.chemspider.com/ is a free chemical structure search engine covering millions of chemical structures with physical and chemical properties, spectra, links to Internet resources and more. You can search by name, structure or substructure, properties, etc

Latest Scirus Seacher newsletter

Do you use Scirus, the scientific web search engine? Their newsletter has helpful hints on how to make better use of it.
http://info.scirus.com/#1

2Collab - new tool for scientists from Elsevier

what is 2collab?
2collab is a new type of research tool launched in 2007- a collaboration platform designed specifically for researchers in the science, technical and medical communities.
Intended for use by professional researchers in academic, government and corporate institutions, 2collab provides three types of features:

1. Online bookmarking and reference management
2. Groups - for sharing with existing networks, or building new ones
3. Networking - find, evaluate and initiate contact with new people

http://www.2collab.com/