I'm assuming you're not counting DMG options.
Magic Item Compendium:
Ehlonna's Seed Pouch, Relic Item. Produces Acorns that can do 11d6 fire splash damage.
Rod of Viscid Globs. Acts as a tanglefoot bag.
Complete Adventurer:
Flash Pellet. Blinds than dazzles.
Complete Psionic:
Crystalline Spider Bead. Throw, release Ectoplasmic Swarm.
Complete Scoundrel:
Ferrous Aqua. damages & sickens those susceptible to Cold Iron.
Liquid Sunlight. Light, damages those damaged by light.
Powdered Silver. Damages those vulnerable to silver.
Rust Cube. Damages creatures made of metal.
Libris Mortis:
Globe of Sunlight. Sunburst spell.
Magic of Incarnum:
Soulvoid Orb. Divest Essentia spell.
Book of Vile Darkness:
Feather Powder. penalties on attacks and checks.
Festering Bomb. Filth Fever disease effects.
Planar Handbook:
Anarchic Water. Damage Lawful Outsider.
Atramen Oil. Fort Save penalty.
Axiomatic Water. Damage Chaotic Outsider.
Bahamut's Breath. Damage Evil Outsider.
Liquid Embers. Fire Damage.
Red Tidewater. Blindness.
Sandstorm:
Liquid Salt. Dessication damage.
Oleum. Smoke, slowing land speed, fire damage.
There are likely more, but I'm out of steam for looking through books.