ScriptBasic is an interpreter for the old language BASIC. It runs on Win32 as well as on UNIXes as a command-line or CGI program interpreter. It includes an interpreter, a compilable, well-documented embedding and extending interface for the C programmer, and a rich set of commands and functions.
GNU/Liberty Basic Compiler Collection (GLBCC) is a suite of tools that allow Liberty Basic source code to be compiled directly to executable programs. It leverages greatly off of the GNU Compiler Collection, which allows it to run both on Windows and Linux, while also having the ability to generate both Linux and Windows executables on Linux via the Mingw cross compiler. The suite also includes a frontend program that has both a GUI and CLI to provide a simple environment to compile Liberty Basic code.
YaBasic Libraries contain routines for creating temporary files, reading values from the MS-Windows registry, retrieving proxy settings from a file or the registry, creating regular expressions for the PHP function preg_replace, conversions from/to octal numbers, recalculating colors from one colorspace to another, gamma correction (including gamma correcting of HTML pages), reading binary files, generating random numbers from the /dev/random device, string replacement, creating SQL commands (inserting binary files into a database), solving linear equations, and encryption with TEA (Tiny Encryption Algorithm).
Ccide reads C, C++, BASIC, or bash source code containing embedded decision tables from stdin, expands the tables, copies the remaining statements, and forms a compilable C or C++ source module, executable bash script, or interpretable BASIC program. Erratic side effects are avoided by evaluating all condition expressions at exactly the same time, and by performing all evaluations and actions in the original sequence.
FreeBASIC is a self-hosting 32-bit BASIC compiler. It makes use of the GNU binutils programming tools and can produce console and GUI executables, and dynamic and static libraries. It fully supports the use of C libraries and has partial C++ library support. It supports a C style preprocessor that is capable of multi-line macros, conditional compilation, and file inclusion. When used in its "QB" language mode, it provides a high level of support for programs written for QuickBASIC.