Bible Explorer. This is a NEAT complete Bible program that is free. Why is it so neat? Because not only do you get a complete OT and NT interactive Bible to download onto your computer, complete with multiple translations (the modern versions are for charge, but there is the ESV which is similar to modern translations), commentaries, thesaurus, strong's concordance, cross-references, hebrew-greek lexicon, full color geographical maps, topical index, and more....You also get to access and download for free complete ebooks like "The Complete Works of Josephus," Calvin's "Institutes of Christian Religion," the complete works of Arminius, "Creeds of Christiandom," Alfred Edersheim's "History Of The Jewish Nation," and more! New free ebook downloads are made available each month, as well as some for pay options of current Christian theologians and authors (that's how they make it all free--there is a little advertising). We've found this to be a very useful program for Bible study, original source documents, and teaching Bible history.
Calvary Chapel's site is the best we've found (so far) for free Bible Coloring and Activity pages that span the ages of preschool through upper elementary (with the activity pages). Lots of Bible stories covered from Old Testament through New Testament. Really well done. They've changed their interface from year's past to an index table with a lot more material. Click on New Testament or Old Testament, then on one of the colored columns for teacher guide or supporting materials to bring those sheets up in .pdf.
The Hall of Church History is a site with many layers of links that link a searcher to supporting documents on church history, most from the original source authors. A simple running narrative connects the links to help you sort through the development of church history over the years.
Interactive Bible FREE Maps These are nice maps of the Bible lands, free to download, copy, or print off (as long as you include their original copyright and website address, highly useful for Bible studies, Sunday School classes, or the homeschool. (We used Internet Explorer and did not have any trouble with the map we downloaded.)
Scripture Memory Challenge This site desires to stimulate Bible memorization through encouragement and challenges. There are online quizzes to take after you have completed a section or chapter. Old and New Testament included.
Sharon's Place provides free, reproducible Bible activity sheets and Bible stories for children (for personal or non-profit use).