The mp-utils package includes a set of portable Unix utilities written by me, Mid Favila. They attempt to comply with both the latest POSIX and SUS specifications, whilst also implementing de facto standards such as sed's -i option. The only time POSIX and SUS will not be obeyed is when doing so requires relatively useless features to be implemented (that, or they will be #ifdef'd). They can be thought of as sitting somewhere between the Suckless tools and Busybox - more sophisticated than Suckless' offerings, and less bloated than Busybox. I recommend compiling these statically.