What is the best website for teachers to find a collection of web based tools for the classroom?
Depends on what grade level you are teaching. For better or for worse, even Mr. Bill Gates recommend Khan academy.
Teachers' Domain is a free digital media service for educational use from public broadcasting and its partners. You’ll find thousands of media resources, support materials, and tools for classroom lessons, individualized learning programs, and teacher professional learning communities.
Udemy.com is great for teaching tools and courses!
Thank you everyone! These sites are great!
I would look here:
MERLOT - Multimedia Educational Resource for Learning and Online Teaching
This site is great: http://www.freetech4teachers.com/
Here you can find all the thing related to the computer http://borntobehacker.wordpress.com/
Classroom Web Tools
Cool Tools For School: Collaborative Tools
100 Free Web Tools for Elementary Teachers
There are many sites.
For an exhaustive list -
For sorted web apps(Google chrome only) -
The most essentials web apps list -