Free, open-source, 32-bit BASIC compiler.
BSEditor: FreeBASIC is a completely free, open-source, 32-bit BASIC compiler, with syntax similar to MS-QuickBASIC, that adds new features such as pointers, unsigned data types, inline Assembly, object orientation, and many others.

Most important features:

* A large number of variable types available
* Arrays
* BASIC Compatibility
* Built-in gfx library
* Clean Syntax
* Completely *FREE*
* Create OBJs, LIBs, DLLs, and console or GUI EXEs
* Debugging support
* Enumerations (enums)
* Escape characters inside literal strings
* Function overloading
* Inline Assembly
* Most of the known C libraries can be used directly, without wrappers
* Multi-platform
* Multi-threading
* Name spaces
* Optimized code generation
* Optional function arguments
* Pointers
* Preprocessor
* Typedefs
* Unicode support
* Unlimited number of symbols
* User-defined Types (UDTs) you can free download FreeBasic for Linux 0.20.0b now.