Here are a few that come to mind:
AG Russell Ultimate Pen Knife.
Opinel #6
Many models from Case - Eisenhower, Pen Knife, small or medium stockman, etc., etc. Ditto similar models from Queen, Robeson, Bear, Buck, Canal Street Cutlery, Schatt-Morgan
Many different Swiss Army Knives from Victorinox or Wenger
There doesn't seem to be any shortage of <3" blades to choose from! Good luck deciding,
-Bob