Rollyo allows you to create your own search engines using the sources of information that you want.
As part of the course I have registered with Rollyo with the user name of donno50. Two searchrolls were created. One was for authorative sources. This is titled "Authorative sources" and includes the Polytechnic Library, the National Library of Australia, State Library of Tasmania, and the University of Tasmania.
The second seach engine is titled "Liblit info". This looks at sites about information literacy.
Rollyo is easy to use and the navigational tabs are clearly set out.