And it's just amazing.
Let me begin by describing a typical workflow:
(1) Go to the summary page for an ACS paper online
(2) Click on the icon that appears in the address bar (looks like a sheet of paper with writing).
That's it. You've just saved the PDF, the HTML full-text and the paper's metadata.
If you've created an account on zotero.org (free of course!), you can synch your library so that multiple computers can share the same data. And best of all you can also synch the attachments (i.e. PDFs, HTML pages) if you have a WebDAV account (e.g. from your university or in my case, JungleDisk Plus/Amazon S3). If that wasn't enough, it also integrates with Word to make it easy to prepare a publication (
In other words, Zotero makes it easy to download papers, back them up, make them accessible from any computer and reference them in papers.
Zotero is open source and freely available from www.zotero.org.
Image credit: jazzmodeus