Applets is a great collection of resources for teachers!
Applets for the Teacher created by Jackie Ghio, by a teacher for teachers. https://sites.google.com/site/appletsfortheteacher/
ASSISTments TeacherWiki a free web-based platform that allows teachers to write individual "ASSISTments" (tutoring “assistance” with “assessment” reporting to teachers.) . It supports all subjects. Its an "eco-system" of researcher, schools, parents, funders, and state partners, working together to help students. http://teacherwiki.assistment.org/