1. Pearl of Power like you mentioned allows arcane and divine spellcasters who memorize spells to recall them 1/day (1st-9th level)
2. Weapons can have the Spell Storing quality, IIRC the spell discharges when you smack someone (when you want it to, as a free action) -- puting Inflict spells into one is a good idea
3. For Psi characters Crystal Capacitors store Power Points letting you to use whatever power you know
4. The Spellsword PrC in T&B can store spells in their weapons like potions
5. Imbue with Spell Ability (Clr spell) allows you to transfer the ability to cast some low level divine spells to allies
6. Imbue Familiar with Spell Ability (T&B) is a bit more potent than the Clr version. IIRC you can transfer up to 6 levels
7. You can store spells with Contigency, technically. Just link a spell you want cast to a command word.
8. Magic of Faerun has three spells from the Simbul (Simbul's Spell Matrix/Sequencer) which allows you to put spells in a "matrix" to be released later as quickened spells.
All I can think of for now...