[spain]

I recommend f.lux too. The only problems I've encountered with it are:

- doesn't take into account wacky sun hours in nordic countries during winter, I get around this by setting my location to be somewhere else

- isn't able to automatically detect when I'm playing a fullscreen videogame, when I would prefer it automatically switch off

[ryanjshaw]

- every now and then I'll edit a photo, upload it somewhere, and then get very confused about why it looks so weird when showing it to somebody on my phone -- it would be great if f.lux shut off when certain user-configurable applications are in focus

[iamlolz]

This is what's kept me from using it, I'm often jumping in and out of photoshop.

[wingerlang]

I don't know about windows, but a recent-ish update on OSX added the ability to disable per application.

http://i.imgur.com/AwDJYyX.png