Well OK, a new corkscrew plus three new knives. I'm sure there are people here with 20 times as many French knives for whom this is nothing new. Also, this is my first time posting images, so please forgive the lack of quality. Anyway, from left to right - a Forge de Laguiole corkscrew, a Nontron Model 25 Turning Ferrule Clog Pocket Knife, an Opinel 10 locking knife with corkscrew, and a Douk - Douk slippie. Since most people may not have any French knives, here are some brief reviews.
The Forge de Laguiole corkscrew is pretty good, with good corkscrew penetration and leverage. Easily opens every corked bottle I've given it, no problem. It had a little burr on the back of the foil cutter that I had to clean up with a jeweler's needle file, but otherwise the quality is very good. This is a keeper. Besides, my wife gave it to me as a Christmas present, so it really is a keeper.
The brand new Nontron will become a favorite. Madnumforce is right, to me the boxwood feels great in the hand. It is a higher quality locking knife than the Opinel. There are little thin almost invisible plastic squares placed between the wood and the base of the blade where it pivots. I wonder if these help to keep the wood dimensionally stable at that point. If so, they do a good job. It's a very secure rotating lock. Though curiously it only locks open and not closed. I wonder if they would run up against some Opinel patent if they offered a closing lock feature? But with that nitpick aside, it is a really good knife and I can see many uses for it. You could EDC it easily. I might do that, if I could ever give up my beater Scallion...
The Opinel's corkscrew is marginal. My old Victorinox Camping SAK has a better one. But the Opinel 10 is a great all-around knife with a decent stainless blade and now has a place on the kitchen counter where it is really useful for a wide range of things. If you are willing to fuss with the corkscrew and keep it clean and dry, it would be a great picnic or light use camping knife. Which it might become.
Then there is the Douk-Douk, made in France for sale in the old colonies. I never knew these knives existed until, well, this thread. I don't like slippies for everyday work due to a few bad experiences, but this is one simple and very rugged knife that feels pretty secure when open, too. It has a "half-catch" when open halfway and it takes a lot of effort to close. I think that within reason you could use it pretty aggressively and not worry about it folding up on you. The blade is painted, not engraved, as Madnumforce mentioned, but the "witch doctor" on the handle is stamped. It is an interesting and unusual knife.
All in all, I'm very pleased with my new French knives.