An OA introduction freely available as a PDF at the link above. "Suber tells us what open access is and isn’t, how it benefits authors and readers of research, how we pay for it, how it avoids copyright problems, how it has moved from the periphery to the mainstream, and what its future may hold. Distilling a decade of Suber’s influential writing and thinking about open access, this is the indispensable book on the subject for researchers, librarians, administrators, funders, publishers, and policy makers."
Freely available as a PDF at the link above. "John Willinsky describes the latest chapter in this ongoing story—online open access publishing by scholarly journals—and makes a case for open access as a public good."
"The Open Access Directory (OAD) is a compendium of simple factual lists about open access (OA) to science and scholarship, maintained by the OA community at large. By bringing many OA-related lists together in one place, OAD makes it easier for everyone to discover them, use them for reference, and update them."
This site helps authors find a summary of permissions that are normally given as part of each publisher's copyright transfer agreement. Perfect for figuring out if you can archive an OA copy of articles you've written.