I love integrals...
It all depends what you mean by integral. A lot of smiths make knives with an integral ferrule and hidden tang. Personally, I love that style. Burt Foster (
http://www.burtfoster.com/) and Bailey Bradshaw (
http://www.bradshawcutlery.com/) are two smiths who have demonstrated their proficience at the style. I have an order with Nick Wheeler (
http://www.wheelerknives.co) for such a piece, which I hop getting in the next 15 years or so...

Several makers from Brazil have also made this a specialty: Ricardo & Gustavo Vilar, Luciano Dorneles, & Rodrigo Sfreddo (
http://www.brazilianbladesmiths.com.br). There's a smith from Canada, (Christoph Deringer) who's made this a specialty. Finally, the top mastersmiths all have made some version (Don Fogg, Jerry Fisk, Tim Zowada, etc, etc)
For more sophisticated construction (full tang with integral guard, sometimes also integral butt, and even integral sub-hilt), the best known makers are stock remover. In no particular order, they include:
- Ricardo Velarde (
http://www.velardeknives.com/)
- Ted Dowell
- Hill Knives of Netherland (
http://www.hillknives.com/)
- Dietmar Kressler
- Todd Begg
Most of those guys are fairly well known, although Hill Knives, being Europeans, don't get the exposure they deserve. Todd Begg is also more of a newcomer, but he has a totaly unique style.
Finally, Scott Cook (
http://www.scottcookknives.com/) is a maker who's created the closest there is to an integral folder, the Lochsa.