A journal I plan to publish results in that is open access:

Nature Communications

Authors can archive pre-print, post-print, and publisher's version. 

This is a "green" journal.

• Author's pre-print on any website (Research articles only)
• Immediately upon publication
• On any website
• Publisher's version/PDF may be used
• Must link to publisher version
• Publisher copyright and source must be acknowledged and DOI cited
• Authors retain copyright
• Creative Commons Attribution License