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Castle C/C++ Development Suite
Commercial C/C++ compiler. Features, details of the subscription scheme, and online ordering.
Desktop Fortran 77
Commercial Fortran 77 compiler. Details of features and ordering.
Easy C++
Commercial C/C++ compiler. Overview, ordering, and information about the Vigil debugger.
GCC Software Development Kit
Open source C, C++, and Fortran compiler and supporting libraries. Native RISC OS compiler, and cross-compiler from Unix.
LCC
RISC OS port of LCC, a small fast open-source C compiler.