Under the Auras section (all these are from BoED), If this was not what was meant by auras, then NM:
Any character with an Exalted Feat (BoED) has an Aura of Good equal to their HD.
Celestial Mystic 1, 10 (BoED), constant effect of Magic Circle vs Evil, at 10th Fast healing 2 10' radius
Defender of Sealtiel 2, 6, 10 (BoED), Constant Magic Circle vs Evil, 1/day Protective Aura at 6th, 3/day 10th
Fist of Raziel 1 (BoED), Constant Magic Circle vs Evil
Risen Martyr 2, 5, 8 (BoED), Constant Magic Circle vs Evil, changes to Constant Protective Aura at 6th, Adds Holy Aura (Self only) at 8th
The Protective Aura is not a listed spell or SLA that I can find, but
is an Su ability of
angels:
Protective Aura (Su): Against attacks made or effects created by evil creatures, this ability provides a +4 deflection bonus to AC and a +4 resistance bonus on saving throws to anyone within 20 feet of the angel. Otherwise, it functions as a magic circle against evil effect and a lesser globe of invulnerability, both with a radius of 20 feet (caster level equals angel’s HD)