Alternatives to Twilight
F.lux
Free
F. lux is a piece of software for Windows, Mac, Linux, iOS, and Android that provides a blue light filter over your screen. Research suggests limiting our exposure to blue light in the hours before
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Iris mini
Free
For Mac 10.6.8 Snow Leopard use this version Iris mini is free and minimalistic version of Iris. This is the entire Iris mini, no UI, no buttons, no many confusing options. Iris mini is software
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