Makita - UB1103 (Rating: 5)

I have used these for years and would not be without.
Does part of what a leaf blower does- clean the walkway, blow leaves off the roof.
Beats compressed air hands down for most things except blowing out bearings.
Variable speed so it can both blast debris out of the back corners, and also delicately sweep fines into a pile.
On a jobsite, it is the sound of quitting time as it is used to blow the dust off of oneself.
The battery model is also useful, but about 2/3 the power so not a replacement.
Don't be put off by the price- just buy it!
Add a long (20-25') cord if it doesn't come with one.