GCC

▶ GNU Compiler Collection, the famous free software compiler ▶ Can compile C, C++, Ada, Fortran, Java, Objective-C, Objective-C++, and generate code for a large number of CPU architectures, including ARM, AVR, Blackfin, CRIS, FRV, M32, MIPS, MN10300, PowerPC, SH, v850, i386, x86_64, IA64, Xtensa, etc. ▶ http://gcc.gnu.org/ ▶ Available under the GPL license, libraries under the LGPL.