Well, since I love a good ray as much as anyone, I made a pretty close to exhaustive list some time ago. Well, after the original date of the thread, but still.
Actually, one of my players made a ray wielding sorcerer, that happened to be the grandmother of the party's bard, built with all relevant age effects. At least, up until an interesting encounter with the Deck of Many Things that netted her several wishes. Good times.
Anything without a source after it is PHB or Spell Compendium, I'm pretty sure. And I didn't check Dragon or Dungeon, just WotC books. Unless otherwise noted, these are only Sor/Wiz spells. Asterisked spells aren't rays, but they behave similarly (either a ranged attack or ranged touch attack)
0:
Acid Splash*
Disrupt Undead
Electric Jolt
Ray of Frost
1:
Chill of the Grave[Deathbound]
Ice Dagger*
Iron Scarf* (Wu Jen only)
Orb of <Element>, Lesser*
Produce Flame[Druid]
Ray of Enfeeblement
Targeting Ray
Ray of Clumsiness
Ray of Flame
Targeting Ray[Bard,Sor/Wiz]
2:
Acid Arrow*
Blast of Force
Blinding Spittle[Druid]*
Cloud of Knives[Cleric,Sor/Wiz]* (PHB II)
Distracting Ray[Bard,Sor/Wiz]
Entangling Scarf* (Wu Jen only)
Fire Shuriken[Assassin, Wu Jen]*
Ice Knife[Assassin,Sor/Wiz,Warmage,Wu Jen]*
Produce Flame[Fire]
Rainbow Beam
Rain of Needles* (Wu Jen only)
Ray of Ice
Ray of Sickness
Ray of Stupidity
Ray of the Python[Bard] (PHB II)
Ray of Weakness
Saltray[Druid]
Scorching Ray
Seeking Ray (PHB II)
Slashing Darkness[Cleric]
Splinterbolt[Druid]*
Stingray[Bard,Sor/Wiz]
3:
Blast of Force[Force]
Disrupt Undead, Greater
Ghoul Gesture[Hunger]
Hailstones*
Icelance[Druid,Sor/Wiz]*
Magnetism* (Wu Jen only)
Melf's Unicorn Arrow* (PHB II)
Ray of Dizziness[Bard,Sor/Wiz]
Ray of Exhaustion
Ray of the Python (PHB II)
Rust Ray
Searing Light[Cleric,Sun]
Slashing Darkness[Cleric] (Champions of Ruin)
4:
Dimensional Anchor[Cleric,Sor/Wiz]
Defenestrating Sphere*
Enervation
Languor[Druid]
Orb of <Element>*
Poison Needles* (Wu Jen only)
Ray of Deanimation
5:
Bolts of Bedevilment[Bard,Madness]
Darkbolt[Darkness5]
Fire Breath* (Wu Jen only)
Lucent Lance
Moonbow*
Prismatic Ray
Viscid Glob
6:
Bolt of Glory[Cleric,Glory]
Disintegrate
Freeze[Druid]
Lucent Lance[Cleric]
Ray of Entropy
Ray of Light[Bard,Sor/Wiz]
Spirit Needle*
7:
Antimagic Ray
Avasculate
Decapitating Scarf*
Disintegrate[Destruction]
Energy Ebb[Cleric, Sor/Wiz]
Prismatic Eye*
Stun Ray
8:
Avascular Mass
Blackfire
Polar Ray
9:
Energy Drain
Meteor Swarm*
Sphere of Ultimate Destruction*