The Small Device C Compiler (SDCC), targeting 8-bit architectures
Open Watcom C/C++ compilers and tools Fork
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Ada cross compiler and libraries for AVR µCs
A C Compiler/Editor for Retro 6809 Machines (Colour Computer/Dragon)
Build System for FLDIGI Applications
Embedded linux and cross toolchain
Dual-target(32 & 64-bit) MinGW-W64 compilers for 32 and 64-bit windows