I assume this is a question, yes its free(though not up to date, it also has spin offs like wxWidgets)
Another good an free compiler is Code::Blocks, combined with the freeware version of QT or SDL depending on your aims and you have a monster. Dev-Cpp is nice(i use for all my freeware stuff), but its prone to random crashes and data corruption...
APLX is a very complete implementation of the APL programming language from MicroAPL. The company stopped producing it in 2016 and it has been taken over by Dyalog. While Dyalog ...