HEATKEYS

Zotero is a powerful, easy-to-use research tool that helps you gather, organize, and analyze sources and then share the results of your research.

Find what you want in a library near you with WorldCat, a global catalog of library collections.

iPad, iPhone and iPod touch app store listings, news, and price drops

For iPhone developers who love their apps, App Annie keeps tabs on your apps, making it easy to track sales, rankings, and reviews from around the world.

Scribd is a social publishing site, where tens of millions of people share original writings and documents. Scribd

¡Bienvenido a Facebook en Español! Facebook es una herramienta social que pone en contacto a personas con sus amigos y otras personas que trabajan, estudian y viven en su entorno. Facebook se emplea para estar en contacto con amigos, cargar un núm...

Accurate, up-to-date, comprehensive cancer information from the U.S. government

Providing researchers with access to millions of scientific documents from journals, books, series, protocols and reference works.

Internet Archive is a non-profit digital library offering free universal access to books, movies & music, as well as 150 billion archived web pages.