IIRC redshift was the most developed of them when I looked into it a while back.
http://alternativeto.net/software/f46lux/?license=opensource
dfc@ronin:~$ apt-cache search redshift gtk-redshift - Adjusts the color temperature of your screen with GTK+ integration redshift - Adjusts the color temperature of your screen
IIRC redshift was the most developed of them when I looked into it a while back.
http://alternativeto.net/software/f46lux/?license=opensource