Dave’s Garden

http://davesgarden.com/

An online community of gardeners.  This site offers: PlantFiles, “the largest plant database in the world”; Garden Watchdog, a guide to gardening by mail; Go Gardening, a database of nurseries, garden centers, public gardens and parks; Bug Files, a database of insects and bugs; and Bookworm, a database of gardening books.

HubMed

www.hubmed.org

“HubMed uses information from PubMed’s database, provided by the NCBI through the EUtils web service, to produce a search interface focused on browsing, organising and gathering information from the biomedical literature.”  Basically, it’s an easier interface for searching PubMed.

“Special features of HubMed include date- or relevance-ranked search results; web feeds for regular updates of published literature matching any search; clustering and graphical display of related articles; expansion of query terms; direct export of citation metadata in many formats; linking of keywords to external sources of information; manual categorisation (tagging) and storage of interesting articles.”