Yes, you can do this with many scientific indexing service. Personally, I like Scopus. It is subscription-based, though.
First, find the author page. I find this easiest by searching for the title of any publications by the said author, because most names are far from unique.
Here, you can click on co-authors. This will give you a list. For example, I currently have 31 co-authors, here sorted by number of publications:
Note that this doesn't state how many documents in particular I have in common with this co-author. To get that, click instead on Documents, then, under Author Name, on More:
You can get similar information through the Author Evaluator → co-authors.
Needless to say, 100% of my publications have myself as an author ;)