Winamp source code got released... but the license prohibits distribution of modified versions *in any form*, and completely forbids even *creating* a fork. https://github.com/WinampDesktop/winamp?tab=readme-ov-file
A new release of the open source Carmageddon implementation is here. Now with fully functioning software renderer!https://github.com/dethrace-labs/dethrace/releases/tag/v0.8.0