The folks at Baseball Prospectus have decided to make their entire archive free to all users. Previously, the majority of archived articles were accessible only to premium subscribers. From this point forward, only articles posted within the past year will be reserved for subscribers.
BP is the gold standard for and essentially the inventor of professional, modern baseball analysis — originally far outside the mainstream but increasingly redefining the mainstream as the years have gone by. Its archive has been an invaluable resource for me as long as I've been writing for LGT, and in particular since Kevin Goldstein joined the crew.