Moving off-turn

[Serum]

I'm looking for ways for a character to move when it isn't his turn. So far, I've come up with:
Sidestep feat
Combat Patrol feat
Dodging Panache (Ex) deed from Swashbuckler

Are there any other abilities/items that would allow this to happen?

[RumpinRufus]

Contingent Action

Intercept Charge

[Imbicatus]

Ready an action to move/charge.

[blahpers]

Ready a (non-movement) action and combine a 5-foot step with that action.

[Thac20]

Battle Oracles can take the Surprising Charge revelation.

[BigP4nda]

Step-up, Step-up and Strike. Cartwheel Dodge