Recently I preferred to store my codes as files after using Emacs. However, Quiver Notebooks is one of the most I loved code-based notebooks.

C/C++

Modern C++
Effective C++
C++ Design Pattern
Algorithms

Python & R

Python #temporarily unavailable for security reasons
 Program Trading #temporarily unavailable for security resons
 Computational Physics
MachineLearning & DeepLearning
Advanced Data Analysics Professional; ADP

Linux & System

Assembly Language
Computer Science & Engineering
Kali Linux #temporarily unavailable for security resons
 Linux System Programming #temporarily unavailable for security resons
 Linux Embedded System Programming
Linux Shell Script

Java

Java
Android Programming

Coding Practice

Coding Test - Practice
Number of Cases - Algorithms