18th Century German Philosophy Prior to Kant: Survey of work of, among others, Christian Thomasius and Christian Wolff; from the Stanford Encyclopedia by Brigitte Sassen.
Active Powers: Brief article from the Internet Encyclopedia of Philosophy on this term as used in the Scottish "common sense" philosophy.
Encyclopedists: Article from the Catholic Encyclopedia by C.A. Dubray. Discusses the group of philosophers who contributed to the Encyclopédie.
French Deism: Brief historical survey of the development of Deism in the French Enlightenment. From the Internet Encyclopedia of Philosophy.
Scottish Philosophy in the Eighteenth Century: Survey of Scottish Enlightenment philosophers, including Francis Hutcheson, Henry Home (Lord Kames), and George Campbell; by Alexander Broadie. From the Stanford Encyclopedia of Philosophy.
Wikipedia: Age of Enlightenment: Short article on the thought of this period, and its legacy.