Is anybody aware of open access policies by research funding agencies or national science foundations outside the EU & US? And is there any literature on the motives that bring research agencies to endorse open access policies?
Australia have been leaders for a long while in open access and repositories. The Australian Research Council's open access policy came into action from the beginning of this year http://www.arc.gov.au/applicants/open_access.htm UNESCO also recently made an announcement that all their research will be open access http://www.unicmanila.org/index.php?mod=press_releases&id=140 and the World Health Organisation have made their Bulletin also open access. Many open access stories collected here http://www.scoop.it/t/open-access-news-from-the-rsp-team?sc_source=http%3A%2F%2Fwww.rsp.ac.uk%2F though with a UK slant
ROARMAP maintains a list of funder mandates (which are part of their OA policies) at http://roarmap.eprints.org/view/type/funder=5Fmandate.html
In each mandate description, there's a link to what is often the general OA policy.
In Canada, to my knowledge, only health research funding bodies and agencies, like CIHR, the national agency, have "strong" policies, i.e. with mandates (http://www.cihr-irsc.gc.ca/e/32005.html). The social sciences / humanities funding agency (SSHRC) has also an OA policy (http://bit.ly/tONORt), though much more diluted, but rumours have it that they're planning something more substantial.
As to literature about motives, you may check this report (http://bit.ly/RIHwAF), which was commissioned by the three Canadian funding agencies.