Zotero Everywhere will have two main components: a standalone desktop version of Zotero with full integration into a variety of web browsers and a radically expanded application programming interface (API) to provide web and mobile access to Zotero libraries.
This is one of the best pieces of news I have had in a little while. I love Zotero. As a citation manager it is hands down better than EndNote or Mendeley. The ability to form groups, share libraries, and tag and publish libraries is just what a research group should do. The parsing of citations from databases (Academic Search complete, etc) is slick and pretty much fool proof. As for citation and bibliographic formats, it has more than any other tool I know of. (OK, they still haven’t cracked Oxford, but no one has.) Web clipping, annotation, cross referencing all just work. It has been developed by researchers for researchers funded by a major research funding body (Mellon Foundation). Zotero is open source and free to use. If you want an open tool for cataloguing OERs, this is the one. They provide a generous amount cloud storage space free and reasonably priced additional storage if you want to keep all your pdfs on line for access anywhere. The only drawback (in some eyes) has been that the client is integrated into the Firefox browser. This has not been a problem for me but has been a problem for colleagues who for various reasons are not as fond of Ffx as I am. As long as Zotero was close-coupled to Ffx I couldn’t really sell it to others. But, now, the best just announced the intention to get seriously useful.