Miller is a command-line tool for working with structured data formats like CSV, TSV, and JSON. It allows users to manipulate data using named fields, perform statistical operations, and convert between formats without loading entire files into memory. The tool is efficient and complements other data analysis software.

sq is a command line tool that allows you to query structured data from various sources, including SQL databases and document formats like CSV and Excel. It supports joining data across different sources and outputs results in multiple formats. You can also inspect metadata, compare tables, and perform common database operations.