LCC-Win: A free compiler system for Windows

LCC-Win (formerly LCC-Win32) is not free but dual licensed. Free for personal use, but not so for commercial or educational use.

"This software is not freeware, it is copyrighted by Jacob Navia. It's free for non-commercial use, if you use it professionally you have to have to buy a licence."

The original LCC compiler by Chris Fraser and David Hanson was described in their book, A Retargetable C Compiler: Design and Implementation, which was first published in 1995. Link to the website for the book here:

https://sites.google.com/site/lccretargetablecompiler/

Pelles C is also based on the original LCC compiler, and provides a complete ANSI C development environment for Windows, enhanced for C99 and C11, and can be found here:

http://www.smorgasbordet.com/pellesc/

Unlike LCC-Win, "Pelles C is freeware for any use: personal, commercial, etc", the only restriction being that the compiler can be freely distributed, but not sold.

I have fond memories of this compiler: C was my first programming language, and LCC-Win32 was the compiler I used.