Kernel 5.15.19, PAM, PipeWire and PulseAudio, Wayland and X11 graphical systems, and Rust and Python 3. As graphical environments, both Xfce 4.16 and the latest Plasma 5 (Plasma 5.23.5, Frameworks 5.90, KDE apps 21.12 running under Qt 5.15.3) are available, with Cinnamon and Mate also available from third parties.
The main compilers are gcc-11.2 and llvm 13.0. The default browser is Firefox 91.5esr, with Chromium available as a third-party repository. There is no systemd at all, according to Slashdot.