I made these blocks a few years ago, but never got around to actually sharing them I don't think.
This allows you to search quickly for a user in your system, without having to go through the Site Administration.
It gives you links for each found user to: login as them, message them, and view their profile (and if you have the bedford college personal learning plan system, also to view their PLP).
This allows you to search quickly for courses in your system, on fullname, shortname or idnumber, without having to go through the Site Administration.
It gives you links for each found course to: view the course, edit the course, and view the list of participants.
There is an updated version for 2.6 on my machine at work, with the ability to also view the parent & child courses of the course, which I can upload if anyone wants that.
They should work for 2.4 - 2.6. I haven't tested in anything above 2.6, but I'd imagine they work, they are quite minimal.