i'd encourage people to compile from source. the binary in "downloads" was compiled without the "-march=native" flag, in order to support older cpus, so it's a bit slower. also, i don't intend to update it regularly - i'll probably remove it in a couple of days.
https://bitbucket.org/ngn/k/downloads/k (Linux binary 64-bit)
https://bitbucket.org/ngn/k/get/master.tar.gz (Source code)
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