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Be careful of licensing.
At least two of these utilities are in a bit of a gray area for free software. Piriform CCleaner and Defraggler are free for individual use, but should be paid for when you start to use them in an office environment. These also have a business counterpart which includes support and many more features. Just because you don't think you need support doesn't mean you are not in a licensing violation if you use them on 20, 100, or 1000 computers.