Which armor special abilities can be applied to Bracers of Armor?

The Bracers of Armor page states:

Bracers of armor cannot have any armor special abilities that add a flat gp amount to their cost.

And, a Q&A with Jason Bulmahn clarified that Bracers of Armor do not count as any wieght class of armor, so any ability that specifies that it can only be put on light/medium/heavy armor can’t be put on Bracers of Armor.

With those restrictions in mind, which Armor Special Abilities can you put on Bracers of Armor?