I just came across this excellent treasure trove of educational web tools organized into different categories. This work has been done by Learning Through Digital Media, a great website to check for edtech tools and tutorials.
The digital kit will introduce you to some awesome web tools to use in your classroom and with your students. Below is a summary of the web tools featured in the first two sections. Check out the the The digital kit to learn more.
1- Tools for Collaborative Writing
2- Presentation Tools