Wine can smooth fonts, but not by default. I shudder to think how many are staring at jaggies and booting Windows to see smooth fonts in the Wtlib.

If you dont mind text then Igor T has written a script that does the work for you:

Or you could just trust him and run these two commands in your terminal.
The first command downloads the script (text file), and the second runs the script.

wget http://files.polosatus.ru/winefontssmoothing_en.sh
bash winefontssmoothing_en.sh