Internet websites that feature late 1600's information that affected and influenced the 18th century and beyond
This site maintained by Margo Burns, contains information and resources about 17th century New England. It especially focuses on the Salem Witch Trials of 1692. I highly recommend that you start here if you are researching this topic.
From The Avalon Project at Yale University, here are some important documents of the 17th century.
This new site maintained by the University of Pennsylvania Library. It contains texts--books, manuscripts, illustrations, maps, and artifacts--generated by Europe's colonization of the Americas.