Man pages:
| chronic | runs a command quietly unless it fails |
| combine | combines sets of lines from two files using boolean operations |
| ifdata | get network interface info without parsing ifconfig output |
| ifne | run a program if the standard input is not empty |
| isutf8 | check whether files are valid UTF-8 |
| lckdo | run a program with a lock held |
| mispipe | pipe two commands, returning the exit status of the first |
| parallel | run programs in parallel |
| pee | tee standard input to pipes |
| sponge | soak up standard input and write to a file |
| ts | adds a timestamp to the beginning of each line of input |
| vidir | edit directory |
| vipe | edit pipe |
| zrun | automatically uncompress arguments to command |
To install it on various distros: