C Programming Tutorials:

1. An Introduction to C
2. Variables Functions and Pointers
3. Conditional Statements and Loops
4. Enumeration , Structures and Unions
5. Working With Multiple Source Files
6. The C Standards
7. Working With Other Libraries
8. Writing a Guessing Game
9. Temperature Converter in C
10. Vectors
11. The String Header File
12. assert.h
13. File Handling
14. Linked Lists in C

C++ Programming Tutorials:

1. Getting Started With C++
2. Variables in C++
3. Conditionals
4. Loops
5. Functions
6. Classes Part 1
7. Type Qualifiers
8. Namespaces
9. Basic Templates
10. Classes Part 2
11. Putting things together
12. Programming Idioms Part 1.

Linux Tutorials:

1. Common Linux Command-Line Tools
2. Debian Package Management
3. File Permissions
4. File System Hierarchy

Computer Science Tutorials:

1. Number Systems
2. Pseudocode
3. Programming Paradigms 

Java Tutorials:

1. Introduction To Java
2. Variables

Python Tutorials:

1. Introduction To Python
2. Variables And Datatypes
3. Conditionals