If you want to list all the drivers (kernel extensions in OS X jargon) that didn't come pre-installed with OS X, open a terminal window and type the following command:
$ kextstat| grep -v com.apple
You'll always get the following line, which are the column headers:
Index Refs Address Size Wired Name (Version) <Linked Against>
That means there are only Apple-provided drivers present on your system. As an example, I've got the Logitech OS X driver installed, plus I've got VirtualBox and two keyboard remapper tools installed:
$ kextstat| grep -v com.apple
Index Refs Address Size Wired Name (Version) <Linked Against> 70 0 0xffffff7f80df6000 0x46000 0x46000 com.Logitech.Control Center.HID Driver (3.9.1) <69 67 37 31 5 4 3> 130 0 0xffffff7f82a9d000 0x28000 0x28000 org.pqrs.driver.Karabiner (10.8.0) <31 5 4 3 1> 131 0 0xffffff7f82ac5000 0x6000 0x6000 org.pqrs.driver.Seil (11.3.0) <31 5 4 3 1> 132 3 0xffffff7f82acb000 0x58000 0x58000 org.virtualbox.kext.VBoxDrv (4.3.24) <7 5 4 3 1> 133 0 0xffffff7f82b23000 0x8000 0x8000 org.virtualbox.kext.VBoxUSB (4.3.24) <132 95 37 7 5 4 3 1> 134 0 0xffffff7f82b2b000 0x5000 0x5000 org.virtualbox.kext.VBoxNetFlt (4.3.24) <132 7 5 4 3 1> 135 0 0xffffff7f82b30000 0x6000 0x6000 org.virtualbox.kext.VBoxNetAdp (4.3.24) <132 5 4 1>
As an aside, if you want to remap some keys on your keyboard, be sure to check out the donation-supported utilities Karabiner and Seil.