>asmutils is a set of miscellaneous utilities written in assembly language, targeted on embedded systems and small distributions (e.g. installation or rescue disks); also it contains a small libc and a crypto library. It features the smallest possible size and memory requirements, the fastest speed, and offers fairly good functionality. Now project supports Linux and BSD family (FreeBSD, OpenBSD, NetBSD); Unixware, Solaris, and AtheOS support is in beta stage (also there's no more supported BeOS port), and it is /theoretically/ possible to port it to any i386 OS.
