The American Association of School Librarians, a division of The American Library Association share their Best Websites for Teaching and Learning.
EdTechTeacher puts together lists of the best technology tools by topic, subject, and learning activity
Getting Smart includes current ideas and initiatives in technology, leadership, and teaching.
From the Evansville Vanderburgh School System: Web Tools that Teachers can use for Assessment
Cult of Pedagogy: Included in their inspiring well-developed teaching advice, is this section on emerging tech tools.