InnoTek GCC for OS/2 is a commercial distribution of the GNU C/C++ compiler suite and associated utilities for the IBM OS/2 platform. InnoTek maintains an OS/2 platform port of the GNU C/C++ compiler suite and provides comprehensive support for the compiler environment to enterprise customers.  Source and References
The GCC compiler suite is licensed under the GNU Public License (GPL) and can be used free of charge. All OS/2 specific changes and enhancements performed by InnoTek are released under the GPL as well. InnoTek GCC for OS/2 can be downloaded at no charge.
- Innotek, bought by Sun, bought by Oracle.