rtl8192ce is a PCI-E driver for RTL8192CE/RTL8188CE devices.
rtl8192cu is a USB driver for RTL8192CU/RTL8188CU devices.
rtl8192de is a PCI-E driver for RTL8192DE/RTL8188DE devices.
rtl8192se is a PCI-E driver for RTL8192SE/RTL8191SE devices.
r8192e_pci is a PCI-E driver for RTL8192E devices.
r8712u is a USB driver for RTL8712U/RTL8192SU devices.
A mac80211 version of this is in beta: http://marc.info/?l=linux-wireless&m=133644369802444&w=2 http://marc.info/?l=linux-wireless&m=133644367402433&w=2
r8192u_usb is a USB driver for RTL8192U devices.
They are included in the staging tree at linux-2.6/drivers/staging and they are NOT supported by linux-wireless developers or mailing list. Instead ask for support in http://driverdev.linuxdriverproject.org/mailman/listinfo/devel . Maintainers are Greg Kroah-Hartman <firstname.lastname@example.org> and Larry Finger <Larry.Finger@lwfinger.net>.
The r8192s_usb driver has been dropped in favor of r8712u, as this http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef.