The following rifle manufacturers chamber the 6.5 Creedmoor: Barrett, Blaser, Browning, Franchi, Howa, Mauser, Mossberg, Nosler, Remington, Sako, Sauer, Steyr, Tikka and Winchester. Then there are bunch of more limited production companies. Most report it's one of their top-selling chamberings, if not the top. Many make more than one model. Blaser, for example, makes both break-action single shots and bolt rifles.
The following companies are offering ammo: Barnes, Berger, Browning, Federal, Hornady, Hunting Shack (HSM), Norma, Nosler, Remington, Sellier & Bellot, Sig Sauer, Swift, and Winchester, plus some brands I've never heard of before.
One of my professional hunter buddies in South Africa also owns a big sporting goods store in Kimberley. He reports at least 3/4 of the new rifles he sells these days are 6.5 Creedmoors, and a friend reports the same thing from a Zimbabwe store.
Obviously the fad is fading.
You forgot Ruger!