Xsettingsd
Xsettingsd is a lightweight xsettings daemon which provides settings to Xorg applications via the XSETTINGS specification when not running one (like when using KDE). Some applications like Java or Wine do not get the font settings through Fontconfig so this is necessary to provide settings like anti-aliasing and font hinting.
Installation
Install xsettingsd or xsettingsd-gitAUR.
Configuration
See https://github.com/derat/xsettingsd/wiki/Settings for detailed syntax.
An example configuration to provide better font rendering:
~/.config/xsettingsd/xsettingsd.conf
Xft/Hinting 1 Xft/HintStyle "hintslight" Xft/Antialias 1 Xft/RGBA "rgb"
Usage
Configure setting in #Configuration and append xsettingsd &
to ~/.xinitrc
if you are using xinit or ~/.xprofile
if you are using a Display manager (see Autostarting for more details).