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.

The article introduces tree-me, a tool designed to streamline the process of using Git worktrees. It allows users to create and manage multiple branches in separate directories with minimal setup, improving workflow efficiency. The tool automates common tasks and organizes worktrees by repository and branch names.

git-who is a command-line tool designed to identify the contributors responsible for entire components or subsystems within a codebase, moving beyond the capabilities of git blame. It provides various subcommands to visualize authorship data in different formats, such as tables and file trees, allowing users to filter results by paths or commits. The tool can be installed via Homebrew or built from source with Go and Ruby dependencies.

A new Ruby management tool called rv is being developed to improve dependency and Ruby version management by combining features from existing tools like Bundler and Python's uv. Written in Rust, rv aims to provide fast and isolated execution of Ruby scripts and commands, simplifying the development process by automatically managing dependencies and Ruby versions. The project is led by a team that includes notable contributors from the Ruby community.