
Hated by many, loved by a few and known by virtually all to some degree, I believe that John Calvin was a great man, evidenced by his fierce love for God and his undying desire to see God glorified. Don't tell an Arminian, but he was also an aggressive missionary trainer and sender!
Although there's tons of websites to go to today about Calvin, let me recommend a few:
Desiring God (John Piper)
Between Two Worlds (Justin Taylor)
Reformation 21 (Alliance of Confessing Evangelicals)
Calvin 500 (Calvin Conference in Geneva)