Lots of them!
A bunch more EN Arsenal books, the EN Armoury books (armour), the EN Adventurer books (general equipment/adventuring gear), the EN Guilds books, a new Librum Equitus (prestige classes), a series of environment books, some more Blackhammer Firearms books, plus other assorted bits and pieces.
Plus, of course, new issues of EN World Gamer, each with a brand new d20 mini-game.