datapacker is a tool to group files by size. It is perhaps most often used to fit a set of files onto the minimum number of CDs or DVDs.

datapacker is designed to group files such that they fill fixed-size containers (called “bins”) using the minimum number of containers. This is useful, for instance, if you want to archive a number of files to CD or DVD, and want to organize them such that you use the minimum possible number of CDs or DVDs.

pv - Pipe Viewer - is a terminal-based tool for monitoring the progress of data through a pipeline. It can be inserted into any normal pipeline between two processes to give a visual indication of how quickly data is passing through, how long it has taken, how near to completion it is, and an estimate of how long it will be until completion.

Cronic is a shell script to help control the most annoying feature of cron: unwanted emailed output, or "cram" (cron spam).