Alternatives to Blackout for all platforms with any license

f.lux

Software that makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day.

Free Mac Windows Linux Android iPhone ... Android Tablet iPad
Blue light filter Color temperature modes Backlight brightness control Colour control ... Time Scheduling Night mode/Dark Theme Scheduling Temperature Monitoring Add a feature

877 Like
Redshift

Redshift adjusts the color temperature according to the position of the sun. A different color temperature is set during night and daytime. During twilight and early...

Free Open Source Windows Linux BSD
Color Temperature Ajustment Color correction Command line interface Portable ... Blue light filter Debian package compatible Fedora Repository KDE Widget Night mode/Dark Theme System management Add a feature

228 Like
RedshiftGUI

RedshiftGUI changes the color temperature of your monitor to better match that of your surrounding. This means that it sets a cooler color temperature during the daytime...
- Discontinued
  The project seems to be no longer developed. Last version, 0.2.4, released in August 2014, can be still downloaded from GitHub.
Free Open Source Windows Linux
No features added Add a feature

89 Like
PangoBright

Screen dimming software that allows you to control the brightness of your screens as well as external monitors.

Free Windows
Dimmer Support for Multiple Monitors Portable Add a feature

13 Like
Dimmer

A very small and free utility for Windows to reduce brightness on LCD/TFT screens. A must if you work on your computer at night with very low ambient light.

Free Windows
Multi-monitor support Automatic brightness dimming Portable Add a feature

19 Like
Screen Filter

Applies a shade that acts as a dimmer to ensure your eyes don't hurt. Far more powerful than Android's built-in brightness setting. Great for low-light gaming...

Free Android Android Tablet
Dimmer Add a feature

8 Like
Iris

Iris is software which makes monitors healthy for the eyes. With iris you can reduce the blue light emitted from your screen for better sleep, reduce the brightness of...

Freemium Mac Windows Linux
Built-in timer Multi-monitor support Automatic brightness dimming Blue light filter ... Night mode/Dark Theme Add a feature

28 Like
iBrightness Tray

iBrightness Tray is a little bit of a swiss army knife display tool as adjusting the brightness of your screen is just one of three main functions it has. The other two...
- Discontinued
  The program is no longer updated. Last version, 1.0, released in 2013, can be still downloaded from the official website.
Free Windows
No features added Add a feature

7 Like
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Calise

A programs which adjust screen brightness due to light detectedby webcam

Free Open Source Linux
No features added Add a feature

3 Like
Nocturne

Nocturne is simple app for switching a computer to night vision mode. It has a few tricks up its sleeve: color correction, window shadow toggling, and background removal.
- Discontinued
  The project has been abandoned. Last version, 2.0.0, released in September 2009, can be still downloaded from Google Code Hosting
Free Open Source Mac
Color correction Add a feature

10 Like