Educational Tools

http://www.weebly.com/

: website/blog software.
It's easy to build a blog and to post and find information. Teachers can upload any documents, videos, maps, etc., and students can find what they need easily. There is a special version of Weebly for students and teachers. Teachers are able to manage their students' accounts and accept HW online.
I've used Weebly and it's absolutely plain and simple. I think it would be a nice tool for my future class.

http://www.ted.com/

: Riveting tools by riveting people.
There is a ton of inspirational videos. The videos are greatly well categorized into talks, speakers, themes, and translations. Also, users can re-size them by most viewed, most popular this month, most comments this week, and so on.
The videos are mostly interesting and enough inspirational. It could be encouraging students to give them opportunities to learn something from riveting people.
I guess that it will improve the listening skill too. Personally, I strongly believe that listening comprehension skill is the most important one for language learners, so if I become a English teacher, I will recommend my students to use this site as a educational tool.