| ArtificialData | create artificial data for testing |
| CountColumns | count columns of files |
| FullJoin | create command to fully join multiple (more than 2) files |
| FullJoinPairs | create command to fully join lines of two files on a common field |
| LeftJoinPairs | create command to left join lines of two files on a common field with no further options |
| MakeFIFOs | creates named Unix pipes, which gzipped files can be streamed to for e.g. further joins |