What for what?

🖼️ Frontend
HTML + CSS
Javascript
React
VueJs
Angular
Svelte

🔙 Backend:
Nodejs/Express
Python/Django
PHP/Laravel
Java
C#

💽 Database
MongoDB
MySQL
Postgres
Redis

🖥️ Desktop
Electron
Tairi
PyQt

📱Phones:
React Native
Flutter
Swift
Kotlin

🖥️ System
Go
C++
Rust