Anyone able to name any more spell DC altering abilities?

[Mathias]

Hello all,
I'm mostly finished implementing spell-by-spell DC tracking (it'll be in the next update), but I'm sure I've missed a few abilities that can alter spell DCs.

I have:
Spell Focus
Greater Spell Focus
Sorcerer Arcane bloodline's School Power ability (15th level)
(the arcane bloodline's base power is situational)
Sorcerer Fey bloodline's base power
Sorcerer Infernal bloodline's base power
(Charming Trait - won't be implemented as a bonus to all language-dependant spells, since it's situational)

Can anyone remember any other abilities that alter the DC or caster level of the spells (or some of the spells) a character can cast?