Here are the links.
https://www.manhattangmat.com/free-gmat.cfm
https://www.princetonreview.com/business ... -test.aspx
This is something you can simply google and find. This is just something I felt after your post. You should at least try finding theses resources, just google "free manhattan GMAT CAT" and this is the first link. I felt sad when I saw the forum reduced to answering such a query.
I don't mean anything personal but it would be good if you show some initiative, even you would feel good. I might be completely off point here and maybe you tried searching and am sorry in that case. But it is nothing too hard to find.
I hope I helped.
Akhil
Please press "thanks" if you think my post has helped you.. Cheers!!