OSX Dark Mode

System Preferences -> General -> Use dark menu

Firefox DevTools

By default

Chrome DevTools

Chrome -> Dev tools -> Settings -> Preferences -> Theme -> Dark

Slack Black Theme

Follow the instruction on site

GitHub Dark

Follow the instruction on site

Ghost

Settings -> Labs -> Night Shift

Crypto Jobs List

By Default

Moo.do

Settings -> Dark Theme

Hacker News Dark

Follow the instruction on site

Trello Night

Follow the instruction on site

Product Hunt Dark

Follow the instruction on site

Twitter Web Dark Theme

Click on Moon Icon

Medium Dark Plugin

Intstall Chrome Add-on

Telegram Mac

Preferences -> General - Dark Mode

Telegram Windows 10 (Unigram)

By Default in Mobile and Desktop

Facebook Messager for Mac (Caprine)

View -> Toggle Dark Mode

Google Search Dark

Follow the instruction on site

Gmail Dark Mode

Follow the instruction on site

Duck Duck Go

Settings -> More Theme -> Dark

Skype Mac

Settings -> Theme -> Dark

Reddit Dark

Follow the instruction on site

Sublime Dark Theme

Sublime Text -> Preferences -> Theme -> Adaptive

Notepad++

Follow the instruction on site

Vim Dark Theme

Follow the instruction on site

Atom

Follow the instruction on site

IntelliJ / PyCharm/ PhpStorm

Follow the instruction on site

Xcode

Follow the instruction on site

Visual Studio Code

Follow the instruction on site

Upterm Terminal

By default

freeCodeCamp

Settings -> Night Mode

Circadian

Theme-switching for Emacs based on daytime or geo

Crontab Guru

By default

Regex 101

Setting -> Theme -> Dark

Amazing Marvin

Menu -> Switch to night theme

Discord

Setting -> Appearance -> Dark

YouTube Dark

Profile -> Dark Theme On

Facebook Dark

Follow the instruction on site

Citationsy

Follow the instruction on site

Baby Buddy

Click in moon icon on the right

Dark Reader

Follow the instruction on site

Crypto Compare

Developers -> Turn Lights Off

Van Secrets

Night icon in the lower right corner