This site hosts both the FBtoC Project and the FutureBasic Freeware downloads. On 1 January 2008, Staz Software announced FutureBasic as freeware. Downloads and their executables are freeware, but source code and rights of distribution are reserved to the respective authors (the FBtoC team and Staz Software).
FutureBasic 5 builds Mac OS X Carbon applications (32-bit only) and command-line tools (32- and 64-bit).
The FutureBasic 5 IDE consists of a syntax-aware editor, and a translator (FBtoC) that converts FB code into C code. The translation is then compiled with one of the system compilers (gcc or clang).
FB and MacOS X 10.7 'Lion'
FB 5.7+ works almost seamlessly in 10.7.
Universal builds and those targeting 10.4 or 10.5 require an Xcode 3 Developer folder.
Read: Installation and settings