Nocturne is a small Mac OS X program which can change your display colors in various ways to give you a color scheme more suited to low light conditions (such as at night). Developed by Blacktree
License: Open Source
Nocturne is designed for simplicity and ease of use, focusing on effective blue light reduction with a user-friendly interface. In contrast, f.lux offers a more comprehensive set of features, including advanced customization options and integration with other apps, making it suitable for users who need more control over their screen's color temperature.