Here’s a German site with some free-access older articles, especially from Hermes.
http://www.digizeitschriften.de/no_cache/en/home/open-access/nach-zeitschriftentiteln/
It seems to be mainly intended as a rival for JSTOR, but does have some free content. A similar French site is here, supposedly but I couldn’t get it to display:
Thank you, very useful link, [but I got bored waiting French].
Are you familiar with Project Gutenburg:
http://www.gutenberg.org/wiki/Main_Page
“There are over 27,000 free books in the Project Gutenberg Online Book Catalog.
A grand total of over 100,000 titles are available at Project Gutenberg Partners, Affiliates and Resources.”
Thanks for the link, but of course I am familiar with it.
For open access periodicals see also
Revues.org
http://ancientworldonline.blogspot.com/
Elektronische Zeitschriftenbibliothek
Volltextzeitschriften nach Fachgebiet
http://rzblx1.uni-regensburg.de/ezeit/fl.phtml?colors=7&lang=de&selected_colors%5B%5D=1&bibid=AAAAA
DOAJ
http://www.doaj.org/
For open access periodicals you’ll probably also be familiar with:
Revues.org
http://ancientworldonline.blogspot.com/
Elektronische Zeitschriftenbibliothek
Volltextzeitschriften nach Fachgebiet
http://rzblx1.uni-regensburg.de/ezeit/fl.phtml?colors=7&lang=de&selected_colors%5B%5D=1&bibid=AAAAA
DOAJ
http://www.doaj.org/
Thank you very much for these, which my spam filter caught. Most useful!