libbzip2 is the library implementing .bz2 file or in-memory compression and extraction, with interfaces similar to zlib.
Website: http://bzip.org/
Platforms supported: Win32, Linux, DOS, FreeBSD, Haiku
Headers to include: bzlib.bi
Header version: 1.0.6
Examples: in examples/compression/
Haiku R1 beta 6 amd64: `examples/compression/bz2compress.bas` compiled and
ran with FreeBASIC 1.20.4-3 against HaikuPorts bzip2 1.0.8, compressing the
repository's `fblogo.bmp` fixture.