This has been recommended to me by a couple of people now, so I think it’s only fitting that I share a link with you.
To quote what they say on the web page:
“ClichéCleaner is a program that helps you write better, by highlighting passages in your text that are either clichés, other overly-used common expressions, or phrases of your own that you have repeatedly used within the same document. ClichéCleaner includes a list of nearly 7000 unique clichés and common expressions that are compared against your text.”