Libspectrum 1.5.0 is available for download:
Libspectrum is a ZX Spectrum emulation library. Compiled with all the optional dependencies working. libspectrum is a library designed to make the input and output of some ZX Spectrum emulator files slightly easier. Open source under the GNU GPL V2 license.
Official site: https://fuse-emulator.sourceforge.net/libspectrum.php
Ported by: Mentore Siesto