SHERPA's RoMEO service has made available "Publishers Allowing the Deposition of Their Published Version/PDF in Institutional Repositories."
Here's an excerpt from the announcement:
SHERPA has analysed its records to determine which of the 414 publishers listed allow authors to deposit the publishers' version or publishers' PDF of a journal article into the author's institutional repository. 50 publishers allow immediate, un-embargoed deposit into repositories—even more allow use in restricted circumstances. This means that there is a large volume of work which can be deposited directly into repositories even if the author has not retained their own final draft. . . .
We have separated the publishers into sub-sets, indicating any restrictions that are imposed by the publishers on the use of their versions. The sub-sets are: no restrictions, embargos, fee required and embargo & fee required.
