This website has some of the most up to date listings of top apps for classroom management. Good information about each source of technology and some include how you might use it.
This is a great resource for free or almost free learning tools for the classroom. It is split into different grade levels to make it easier for teachers to search.
Google for Educators, shows how teachers and students can be inspired, inventive, and organized using Google software. Because most schools use different types of computers using Google is more in the cloud. Good for technology or business courses.