Open Basic (OB) is an implementation of the BASIC programming language. It is intended to for embedding into user applications as a scripting language. User-defined functions can be written in C/C++, assembler, or other languages and can be activated from BASIC programs, receive parameters of different types, return their results.
The TI-BASIC Compiler allows you to write TI-BASIC programs for the Texas Instruments TI-83 and TI-84+ calculators using your computer instead of the calculator's keyboard. This allows you to spend more time writing code than navigating menus or trying to scroll around the tiny screen on the calculator.
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.
BASIC-256 is a simple BASIC IDE that allows young children to learn to program. It was written in response to David Brin's article, "Why Johnny Can't Code," in which he bemoans the lack of a simple, line-oriented programming language for children that runs on modern computers. It features a byte-code compiler and interpreter, a debugger, easy to use graphical and text output, and an editor.
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.