Elsevier has just announced in its third open letter to the mathematics community (how much does that sound like a Papal Bull?) that all of the archived material from its “primary mathematics journals” is now free to access.
This completes the process begun in April, when they made everything published after 1995 and before 2008 free. From now on, all articles in the affected journals will be made free to access four years after publication1. The journals involved include Advances in Mathematics, Discrete Mathematics, and the Journal of Algebra. It looks like each journal now has a prominent “Open Archive” section on its homepage, containing a list of recently dispaywalled articles.