Some more stuff...

Races:
Fey'ri (Races of Faerûn) - Alter Self (any Humanoid form); LA +2 (but Lesser Planetouched rules...)
Gnome, Svirfneblin (Underdark) - 1/day Disguise Self; LA +3
Gruwaar (Dragon #317) - 1/day Disguise Self; LA +0
Irda (Dragonlance Campaign Setting) - Change Shape (any Humanoid creature; 3/day); LA +2
Seawolf (Stormwrack) - Change Shape (human or a wolf-human hybrid); LA +2 and 4 HD
Tibbit (Dragon Compendium) - Feline Transformation
Worghest (Dragon #350) - Change Shape (wolf); LA +2 (but Lesser Planetouched rules...)

Templates:
Half-Doppelganger (Dragon #313) - Alternate Forms (three Humanoid forms of Medium or Small size); LA +2
Magic-Infused Creature - Minor Polymorph; LA +1

Classes:
Corrupter - NE Paladin variant (Dragon #312) - at 3rd level, Disguise Self Cha mod. times per day (CL = class level)
Mimic - Rogue ACF (Exemplars of Evil) - at 1st, 3rd level, 6th, 9th, 12th, 15th, or 18th level, Disguise Self 1/day (+extra uses by reducing the Trap Sense bonus)
Psion (Egoist) - Change Shape

PrC:
Acolyte of Ego (Tome of Magic) - Cadence of the Secret Mask (Disguise Self for 1 minute per class level)
Eye of Lolth - non-Drow adaptation (Drow of the Underdark) Disguise Self at 3rd level, Alter Self at 6th level, and Polymorph at 9th level
Faceless One (Dragon #300) - at 2nd level, Disguise Self at will; at 5th level - Alter Self at will
Fiend of Corruption (Fiend Folio) - Alternate Form
Mortal Hunter (Book of Vile Darkness) - Mortal Skin
Psion Uncarnate - Assume Likeness
Scar Enforcer (Races of Destiny) - Disguise Self (Elf or Human)
Spy Master (Complete Adventurer) - Cover Identity
Tiger Mask (Dragon #300) at 5th level - Alter Self 1/day
Zhentarim Spy (PGTF p.78): Cover Identity