C Programming/Compilers

Free (or with a free version)

• Ch_interpreter C/C++ interpreter Ch - The software works in Windows, Linux, Mac OS X, Freebsd, Solaris, AIX and HP-UX. The Ch Standard Edition is free for commercial use.
• lcc-win32 lcc-win32 - This software is not freeware, it is copyrighted by Jacob Navia. It's free for non-commercial use. Windows (98/ME/XP/2000/NT).
• GNU Compiler Collection GCC - GNU Compiler Collection. GNU General Public License / GNU Lesser General Public License.
  • w:MinGW MinGW provides GCC for Windows
• Open Watcom Open Watcom Open Source development community to maintain and enhance the Watcom C/C++ and Fortran cross compilers and tools. Version 1.4 released in December 2005.
  • Host Platforms: Win32 systems (IDE and command line), 32-bit OS/2 (IDE and command line), DOS (command line), and Windows 3.x (IDE)
  • Target Platforms: DOS (16-bit), Windows 3.x (16-bit), OS/2 1.x (16-bit), Extended DOS, Win32s, Windows 95/98/Me, Windows NT/2000/XP, 32-bit OS/2, and Novell NLMs
  • Experimental / Development: Linux, BSD, *nix, PowerPC, Alpha AXP, MIPS, and Sparc v8
• Tiny C Compiler
• Portable C Compiler PCC - Portable C Compiler. BSD Style License(s).
• Small Device C Compiler (SDCC)
  • target platforms: Intel 8051-compatibles; Freescale (Motorola) HC08; Microchip PIC16 and PIC18.
• FpgaC. Target platform: FPGA hardware via XNF or VHDL files.
• Interactive C Interactive C.
  • target platform: Handy Board (Freescale 68HC11); Lego RCX
• C compilers for many digital signal processors (DSPs), many of them free, are listed in the comp.dsp FAQ.

Commercial

• Intel C Compiler Intel Professional Edition Compilers - Windows, Linux, Mac, QNX, and embedded C/C++ compilers. Optimized for Intel 32-bit and 64-bit CPUs.
• Microsoft Visual C++ Microsoft Visual C - Free (partially limited) version available (Express edition)
• Impulse C. Target platform: FPGA hardware via Hardware Description Language (HDL) files.