Google Like a Librarian: Cool Tools

When you enter phrases into the Google Books Ngram Viewer, it displays a graph showing how those phrases have occurred in a corpus of books over the selected years.

Zotero is a Firefox Add-on that allows you to collect, store, annotate, and cite your sources as you move around the Internet. "Whether you're searching for a preprint on arXiv.org, a journal article from JSTOR, a news story from the New York Times, or a book from your university library catalog, Zotero has you covered..."

"Answer questions, do math, instantly get facts, create plots, calculators, unit conversions, scientific data and statistics, help with homework—and much more."