SHOUTcast makes you submit a valid email each time you want to download SHOUTcast DNAS or DSP. I’ve put links below that let you to download x86 (32-bit) and x64 (64-bit) straight without nag screens. These links will not get outdated because they always point to the latest.
Windows, BSD, Mac OSX, ARM and DSP links can also be found in the parent directory index.