Best known as the author of "Rock of Ages," Toplady was a gifted theologian and one of the most ardent high Calvinists the Church of England ever produced. John Wesley was his contemporary and his theological nemesis. Some of the polemic they published against one another is as lively and caustic as anything you'll find in any Internet theology forum.
The Westminster Presbyterian
Here you will find a fine collection of rare articles, mostly from a Scottish Presbyterian perspective. Featured authors include James Durham, Robert Murray M'Cheyne, R. L. Dabney, James Henley Thornwell, John Murray, and several others.
Free Church of Scotland
Here you'll find material on Scottish church history, historical theology, and biographical material on Scottish Free Church standouts such as Thomas Chalmers and Alexander Duff. Be sure to note John MacLeod's lectures on Scottish Theologya superb resource.