Toybox (Linux command line utilities)!

BusyBox is a single binary that provides several stripped-down Unix tools in a single executable. It runs in a variety of POSIX environments such as Linux, Android, FreeBSD and others. It was specifically created for embedded operating systems with very limited resources. It has been self-dubbed "The Swiss Army Knife of Embedded Linux". It includes clones of netcat, httpd, init, grep, a dhcp client/server, tar, sh, ash, awk, cat, and many more utilities.

The GNU Core Utilities or coreutils is a package of GNU software containing many of the basic tools, such as cat, ls, and rm, needed for Unix-like operating systems. It is a combination of a number of earlier packages, including textutils, shellutils, and fileutils, along with some other miscellaneous utilities.