The current ADMIXTURE version is 1.22.

ADMIXTURE binaries

Linux x86:         admixture_linux-1.22.tar.gz (requires kernel 2.6.18 or higher)
MacOS X x86:   admixture_macosx-1.22.tar.gz

ADMIXTURE documentation

admixture-manual.pdf

Sample data files

Here is a zipped archive containing all of the data files for the HapMap3 dataset that we described in our paper: hapmap3-files.tar.gz