Understanding C++: An Accelerated Introduction

as the title implies, this site contains a brief, but still quite long, introduction of C++

Introduction to Object-Oriented Programming Using C++

a well written introduction on OOP C++

C++ Language Tutorial

this tutorial is for those that have a good knowledge of C already

Programming in C

a very comprehensize tutorial on C

Free Compilers

DJGPP

a complete 32-bit C/C++ compiler for Intel 80386 (and higher) PCs running DOS

The GNU-Win32 Project

Win32 ports of the GNU development tools for Windows NT and 95, still in beta stage

The GNU software FTP Site

FTP site for GNU software for unix. Includes GCC, a popular C/C++ compiler for UNIX systems