Brill kindly offers free online access to the full archive of Vivarium Journal until November 15, 2010, available here. (almost 50 volumes since 1963!) No registration is needed.
From Brill’s website:
Vivarium is an international journal dedicated to the history of philosophy and the history of ideas from the early Middle Ages to the early modern period. It takes a particular interest in the profane side of philosophy and its relationship with other areas of thought and learning from these periods…