Sente (pronounced sen-tay) makes literature searches easier by providing a front-end to hundreds of data sources around the world, including: PubMed, Web of Science, Ovid, many university library catalogs, various Ovid databases (e.g., Books in Print, CAB Abstracts, Current Contents, PsychINFO -- all by subscription) Agricola, the U.S. Library of Congress, and any other literature database that supports Z39.50 or SRU, and MARC or Dublin Core record syntax.
Sente updates the results of your searches each day so that you can easily stay current with new results. This means that you will learn about important new papers as soon as they appear in any of the databases you search. And the results will remain available until you find the time to review them, even if that happens when you are not connected to the Internet.
Sente provides numerous tools to help you keep your reference library organized, including: unlimited custom data fields, unlimited custom keywords, star ratings, custom statuses, and filters that can use any of these criteria to automatically produce custom subsets of your data.
When it is time to write up your own research, Sente takes care of the details of properly formating citations and bibliographies. Sente includes over 100 pre-defined bibliography styles (e.g., Vancouver, APA, Chicago, Science, etc.) as well as an easy-to-use bibliography format editor that lets you modify the supplied formats or create your own.
A fully-functional, free version of Sente is available here at MacUpdate for download from www.thirdstreetsoftware.com. The pricing schema can be found here.