Zoho has lots of functions, similar to Google Docs. I have not explored these functions. I have used the Zoho Chat function. This allows a teacher to create a chat room, embed the room into a site (website, wiki, blog, Blackboard site, etc.). The room is only open when the teacher opens it. Students cannot see other users. This is ideal for review scenarios or extra help on assignments.
Below is an overview of Zoho. There is a brief chatroom discussion.
Dabbleboard is a free interactive whiteboard space. It allows the teacher to invite students to participate, ask questions, and share information. This could be used in a lab setting or as a distance learning exercise (test review, perhaps).
Tutorial: This is a notable tutorial for 2 things: the sound is terrible--step back from the mic young man; it appears to be made by a student. Hmmm, creating tutorials--fascinating idea for students to learn a pro
Boola-what? That is usually the response I get when discussing Boolean Logic and how that plays out in search engines. Boolify may be the answer to teaching the concept. With search terms and Boolean operators shown as puzzle pieces, students should begin to put things together.
If your students don't understand these concepts, they will end up searching through pages and pages or worthless Internet sites.
Here's an interesting little tool. AnswerGarden allows the user to post a question and see the answers as a word cloud. You can embed the question into your website as I have below. As answers are submitted, the word cloud changes. This is a simple tool, but I like it.