I'm looking for a fully-rigid MTB frame with 26" wheels.

Surly

• Surly Troll
  • not drop bars... but not traditional handlebars either
  • clearance for 2.75" tires
  • is specifically designed for use with a Rohloff Speedhub
    "There’s a dedicated area for anchoring a Rohloff hub OEM2 axle plate"
  • "suspension adjusted" fork :(
• Surly Long Haul Trucker
  • drop bars
  • clearance for 2.1" tires
  • not a suspension adjusted fork
  • variant — Surly Disc Trucker
• Surly 1x1

Salsa

• Salsa Mukluk 3"
• Salsa Blackborow DS

other

• JonesBikes.com [2] (though most of his are 29ers, and while he does take custom orders, he's not putting anyone on the waiting list anymore)
• Redline ?
• Soma ?