Each of these gives you options to set up your features. Click on Options to set up Speech, Prediction, Language and Features
The is an Google Chrome toolbar, which comes as an add on. There are not as many features on it as the main one, but as long as you use your Google Institutional account (student email address), you can access it on any machine, even at home.
Google Docs Bar
Web Pages Bar (Only slightly different)
You can set the language to your own preference
There are many different voices to choose from and many different languages
You can choose which features you want on your toolbar