I took your question a little differently than most. Since I used to process meat for a living to get through school, I thought you meant, "what production knife would you use for skinning!" All the above answers are knives that are adapted by the users for skinning. The knives actually used for skinning in a packing house are made for such. I would recommend a Forschner Lamb Skinner #8199-5. These are used in packing houses all over the country/world. They are only for skinning and are great at it. I take one with me on deer/elk hunts here in Idaho.
I have this pet peeve that we knife nuts have to have the latest and greatest "tactical" knife that is developed for best use by soldiers but we will never use. Then we want to go out and skin a deer with it and claim how good it was at this job. Listen up, folks! You will not see and Buck folders, Bob Dozier knives, BM Nimravi (plural for Nimravus, I think), any folders at all, etc. in a packing house where people remove the hide from animals all day long. The above Forschner is less than $15, won't make your hand tired, stays sharp, and won't make you cry if you lose it.
Bruce Woodbury