Its old as it is running on Moodle 2.9.2 and that version will be dropped when 3.1 hits the scene.
Then we will be focusing on 3.2.
The blocks displayed are all custom built so may well be simply coded using the catergory link where the URL is the same for each category apart from the id so its easy to generate a list and only show the categories you need by hiding others by id. The rotation of the blocks is nice and have seen that in a free template, so it is something you could figure out how to do.
I have often thought it would be nice to have blocks in a row rather than in a columns. which could be in a fixed footer.