http://www.thinkfinity.org/ - Thinkfinity has free educational resources and lesson plans for teachers
http://www.atomiclearning.com – Video tutorials organized by software. Username/password required
http://www.spellingcity.com/ – Spelling City allows teachers to make interactive spelling games out of their spelling lists.
http://www.worksheetworks.com/ - Hundreds of Worksheets for teachers
http://www.glogster.com/ - Interactive posters