This is the oficial driver of Realtek 8187L chipset, with some modifications and upgrades to work fine in > 3.80 Linux kernel.
Tested on Ubuntu 13.04 (Linux kernel 3.8.0-31) with usb card ALFA Networks AWUS036H, used for daily use (navigation, downloads...) and test security of wireless networks with some utils (e.g aircrack-ng)
1) Download the updated driver from GitHub:
wget https://github.com/Dekadencee/rtl8187-Linux-Driver/archive/master.zip
2) Unzip file and remove zip:
unzip master.zip
rm master.zip
3) Compile driver:
cd master
sudo make
sudo make install
4) Backlist the native drivers to aboid conflict:
echo "blacklist rtl8187" | sudo tee -a /etc/modprobe.d/blacklist.conf
5) Reboot or reload drivers manually removing the native one:
sudo modprobe -rfv rtl8187
sudo modprobe -v r8187l
Special thanks to varunendra (http://ubuntuforums.org/member.php?u=1043629) for the guides and tips on Ubuntu forums