If you are just getting started with programming, this kind of resource list is worth keeping close at hand. All of the materials below are in English, but most of them are beginner-oriented and fairly approachable. That makes them useful not only for learning technical topics, but also for building up your reading ability in technical English at the same time.

For newcomers, this is the sort of page that deserves a bookmark.

C

For learning C, there are both basic introductions and more practical system-level materials:

• Introduction to C Programming
• C Optimization Tutorial
• Compiling C and C++ Programs on UNIX Systems – gcc/g++
• Building and Using Static and Shared C Libraries
• Programming in C: UNIX System Calls and Subroutines Using C
• C FAQ
• C Programming Class Notes
• ANSI C for Programmers on UNIX Systems
• Sams Teach Yourself C in 24 Hours
• Sams Teach Yourself C in 21 Days (4th Ed.)
• The Standard C Library for Linux – Part 1: file functions
• The Standard C Library for Linux – Part 2: character input/output
• The Standard C Library for Linux – Part 3: formatted input/output
• The Standard C Library for Linux – Part 4: Character Handling
• The Standard C Library for Linux – Part 5: Miscellaneous Functions
• Programming in C: A Tutorial
• An Introduction to C Development on Linux
• C Programming Course
• C Language Tutorial
• CScene: An Online Magazine for C and C++ Programming

C++

The C++ section ranges from beginner tutorials to class hierarchies, portability, exceptions, Unicode, and dependency management:

• C++ Tutorial
• Understanding C++: An Accelerated Introduction
• An Introduction to C++ Class Hierarchies
• G++ FAQ
• Introduction to Object-Oriented Programming Using C++
• Compiling C and C++ Programs on UNIX Systems – gcc/g++
• C++ FAQ Lite
• C++ Programming Language Tutorials
• Reducing Dependencies in C++
• C++ Exception Handling
• Part 1: Unicode
• Part 2: A Complete String Class
• Making C++ Loadable Modules Work
• Sams Teach Yourself C++ in 21 Days (2nd Ed.)
• C++ Portability Guide
• C++ Tips
• C++ Language Tutorial
• CScene: An Online Magazine for C and C++ Programming
• C++ Libraries FAQ

CGI

For classic CGI development, there are intros, manuals, style guidance, and Perl-focused resources:

• CGI Programming Tutorial
• CGI Programming 101
• CGI Manual of Style
• CGI Developer’s Guide
• CGI Programming Unleashed
• Sams Teach Yourself CGI Programming with Perl 5 in a Week (2nd Ed.)
• CGI/Perl Tips, Tricks and Hints
• A Tour of HTML Forms and CGI Scripts
• Reading CGI Data: URL-Encoding and the CGI Protocol
• CGI Programming FAQ

CORBA

The CORBA materials include FAQs, specifications, introductions, and multi-part development guides:

• CORBA FAQ
• A Brief Tutorial on CORBA
• CORBA 2.0 Specification
• CORBA Tutorials
• Sams Teach Yourself CORBA in 14 Days
• Linux Network Programming, Part 3 – CORBA: The Software Bus
• CORBA Program Development, Part 1
• CORBA Program Development, Part 2
• CORBA Program Development, Part 3

CSS

• CSS2 Tutorial

CVS

• CVS Tutorial
• Concurrent Version System Tutorial

DHTML

• Introduction to Dynamic HTML

Emacs

This section is especially rich, covering both daily use and Lisp-based customization:

• Emacs: The Software Engineer’s Army Knife
• Emacs FAQ
• GNU Emacs Lisp Reference Manual
• Programming in Emacs Lisp
• GNU Emacs Manual
• A Tutorial Introduction to Emacs
• EMACSulation: Internet-ready!
• EMACSulation: Ediff – An Emacs interface to diff and patch
• EMACSulation: Emacs as a Server
• EMACSulation: Customizing Emacs
• Basic Emacs
• EMACSulation: Templating Mechanisms
• Emacs Macros and the Power-Macros Package
• Polyglot Emacs 20.4

Expect

For automation and robust command-line interaction:

• Advanced Programming in Expect: A Bulletproof Interface
• Automating Tasks with Expect
• What Can you Expect?–A Data Collection Project Using Linux

Fortran

These resources span Fortran 77, Fortran 90, GNU Fortran, and scientific uses:

• Professional Programmer’s Guide to Fortran 77
• Fortran 90 and Computational Science
• User Notes on Fortran Programming
• Fortran Programming for Physics and Astronomy
• A Fortran 90 Tutorial
• Using GNU Fortran
• Fortran 90: A Course for Fortran 77 Programmers
• Fortran 90 for the Fortran 77 Programmer
• Introduction to Fortran

GIMP

This group is broader than programming alone, mixing user guides, scripting, effects, plugins, and practical tutorials:

• GIMP Tutorial Index
• A Tutorial for Perl GIMP Users
• A Scheme Tutorial for GIMP Users
• GIMP Guide
• The GIMP User Manual
• Pseudo 3-D with GIMP
• Graphical Photocomposition with GIMP
• Creating Text with the GIMP
• Creating Fire Effects with the GIMP
• Creating and Editing Animations with GIMP
• GIMP-Perl: GIMP Scripting for the Rest of Us
• Writing a GIMP Plugin
• GIMP: The RRU Tutorial
• GIMP User FAQ
• Script-Fu Tutorial
• The Quick Start Guide to the GIMP, Part 1
• The Quick Start Guide to the GIMP, Part 2
• The Quick Start Guide to the GIMP, Part 3
• The Quick Start Guide to the GIMP, Part 4

GNOME

For desktop application development with GNOME libraries:

• Application Programming Using the GNOME Libraries
• Part 1: Everything You Need to Get Started
• Part 2: Building a Sample Genealogy Program
• Part 3: Adding File Saving and Loading Using libxml
• Creating GTK+ Widgets with GOB: An Easier Way to Derive New GTK+ Widgets
• Handling Multipel Documents: Using the GnomeMDI Framework
• Livening Things Up: Graphics Made Easy Using the GNOME Canvas
• Developing Gnome Applications with Python – Part 1

GTK

If you are interested in the GTK stack, these references and tutorials cover the main pieces:

• GDK Reference Manual
• GLib Reference Manual
• GTK+ Reference Manual
• The GIMP Toolkit
• GTK+ FAQ
• GTK V1.2 Tutorial
• Drawing and Event Handling in GTK
• An Introduction to the GIMP Tool Kit

Gnuplot

This section mixes plotting and scientific visualization with modeling topics:

• Constrained Dynamics
• Continuum Dynamics
• Differential Equation Basics
• Energy Functions and Stiffness
• Particle System Dynamics
• An Introduction to Physically Based Modeling
• Rigid Body Dynamics I
• Rigid Body Dynamics II
• Scientific Visualization Tutorials
• Gnuplot – An Interactive Plotting Program
• GIF Animation Tutorial

HTML

For learning HTML fundamentals and some more advanced document techniques:

• HTML Table Tutorial
• HTML by Example
• How to Use HTML 3.2
• Creating a Client-Side Image Map
• Advanced HTML: How to Create Complex Multimedia Documents for the Web
• The ABCs of HTML
• Sharky’s Netscape Frames Tutorial

ILU

• ILU Reference Manual
• Using ILU with ANSI C: A Tutorial
• Using ILU with Java: A Tutorial
• Using ILU with Python: A Tutorial

IP Masquerading

These materials focus on Linux networking and packet filtering:

• ipchains: Packet Filtering for Linux 2.2
• Setting Up IP Masquerade
• Setting Up IP-Masquerading
• Ipchains: Easy Links to the Net
• Linux Networking Using Ipchains

IPC

For inter-process communication on UNIX-like systems:

• Advanced 4.4BSD Interpprocess Communication Tutorial
• UNIX Multi-Process Programming and IPC

Java

The Java section is one of the largest, covering language basics, enterprise development, servlets, security, RMI, Swing, networking, specifications, and Linux setup:

• Enterprise JavaBeans Tutorial
• JavaBeans Short Course
• Introduction to the JavaBeans API
• JDBC Short Course
• Essentials of the Java Programming Language, Part 1
• Essentials of the Java Programming Language, Part 2
• Writing Advanced Applications for the Java Platform
• Fundamentals of Java Security
• Fundamentals of Java Servlets
• Introduction to the Collections Framework
• Introduction to CORBA
• Fundamentals of RMI
• Advanced
• Introductory
• Intermediate
• Java Language Specification
• Java Tutorial: Servlet Trail
• Java Virtual Machine Specification (2nd Ed.)
• Glossary of Java and Related Terms
• The Java Language Environment
• Java Look and Feel Design Guidelines
• Story of a Servlet: An Instant Tutorial
• Introduction to Java
• Java2D: An Introduction and Tutorial
• Java Servlet Tutorial
• comp.lang.java FAQ
• Brewing Java: A Tutorial
• Shlurrrppp … Java: The First User-Friendly Tutorial on Java
• Swing Tutorial
• Swing: A Quick Tutorial for AWT Programmers
• Thinking in Java
• Java RMI Tutorial
• Java for C++ Programmers
• The Advanced Jav/aJ2EE Tutorial
• Hacking Java: The Java Professional’s Resource Kit
• JFC Unleashed
• Java Developer’s Guide
• Java Developer’s Reference
• Sams Teach Yourself Java in 21 Days (Professional Reference Ed.)
• Java Unleashed (2nd Ed.)
• Java 1.1 Unleashed (3rd Ed.)
• Java Game Programming Tutorial
• Java Networking FAQ
• Java Tutorial: A Practical Guide for Programmers
• Sockets Programming in Java
• Programming with Java – Part I
• Programming with Java – Part II
• Setting Up a Java Development Environment for Linux
• Understanding Java
• Beginner’s Guide to JDK
• GUI Development in Java
• Java Servlets: An introduction to writing and running Java servlets on Linux

JavaScript

For client-side and server-side JavaScript, including guides, references, and beginner tutorials:

• Introductory JavaScript Tutorials
• JavaScript Authoring Guide
• Client-Side JavaScript 1.3 Guide
• Client-Side JavaScript 1.3 Reference
• Core JavaScript 1.4 Guide
• Core JavaScript 1.4 Reference
• Server-Side JavaScript 1.4 Guide
• JavaScript FAQ
• JavaScript Tutorial
• The Way of JavaScript
• Voodoo’s Introduction to JavaScript
• JavaScript Tutorial for Programmers
• JavaScript Primer
• EchoEcho JavaScript Tutorial
• Sams Teach Yourself JavaScript 1.1 in a Week (2nd Ed.)

Lisp

• Common Lisp Hints
• Common Lisp the Language (2nd Ed.)
• Lisp FAQ
• Lisp Programming Tutorial
• Lisp Tutorial
• LISP Tutorial
• Common Lisp HyperSpec

MIDI

• Basic MIDI Tutorials
• Tutorial on MIDI and Music Synthesis

ML

• ML Tutorial
• Programming in Standard ML ’97
• A Gentle Introduction to ML
• Moscow ML Owner’s Manual

MPI

For parallel programming and high-performance computing:

• An MPI Tutorial
• Tutorial on MPI
• MPI: Portable Parallel Programming for Scientific Computing
• Tuning MPI Applications for Peak Performance
• MPI: From Fundamentals to Applications
• MPI Tutorial
• MPI: The Complete Reference
• Introduction to Parallel Programming Using MPI
• Basics of MPI Programming

Matlab

• Matlab Basics Tutorial
• Matlab Summary and Tutorial
• Matlab – Official Online Manuals in PDF

Miscellaneous

• The Soar 8 Tutorial Home Page

The range here is wide: low-level programming, web development, Linux tools, scientific computing, editor customization, GUI development, scripting, and even graphics work. For a beginner, that breadth is exactly what makes this list so useful—you can start with one language, then branch into related tools and ecosystems without having to search from scratch every time.