Picocli is a one-file Java framework for parsing command line arguments and generating polished, easily tailored usage help messages. Java command line parser with both an annotations API and a programmatic API, featuring usage help with ANSI colors, autocomplete and nested subcommands. In a single file, so you can include it in source form. This lets users run picocli-based applications without requiring picocli as an external dependency.

picocli - a mighty tiny command line interface

Podman (the POD MANager) is a tool for managing containers and images, volumes mounted into those containers, and pods made from groups of containers. Podman is based on libpod, a library for container lifecycle management that is also contained in this repository. The libpod library provides APIs for managing containers, pods, container images, and volumes.

Podman - A tool for managing OCI containers and pods

usql is a universal command-line interface for PostgreSQL, MySQL, Oracle, SQLite3, Microsoft SQL Server, and other databases.The below is a demonstration using usql with xo's booktest simple test database, showcasing the release version v0.5.0. In the demonstration, usql connects to a PostgreSQL database, executes some queries, with variable interpolation, connects to a SQLite3 database file, and does some more queries, before then connecting to a Microsoft SQL database and ending the session.

usql - universal command-line interface for SQL databases

fzf is a general-purpose command-line fuzzy finder.It's an interactive Unix filter for command-line that can be used with any list; files, command history, processes, hostnames, bookmarks, git commits, etc.

fzf - A command-line fuzzy finder

skopeo is a command line utility that performs various operations on container images and image repositories. skopeo can work with OCI images as well as the original Docker v2 images. Skopeo works with API V2 container image registries such as docker.io and quay.io registries, private registries, local directories and local OCI-layout directories. 
<BR><BR>
skopeo can perform operations which consist of:
<ul>
<li>Copying an image from and to various storage mechanisms.
For example you can copy images from one registry to another, without requiring privilege.</li>
<li>Inspecting a remote image showing its properties including its layers, without requiring you to pull the image to the host.</li>
<li>Deleting an image from an image repository.</li>
<li>Syncing an external image repository to an internal registry for air-gapped deployments.</li>
<li>When required by the repository, skopeo can pass the appropriate credentials and certificates for authentication.</li>
</ul>

skopeo is a command line utility that performs various operations on container images and image repositories. skopeo can work with OCI images as well as the original Docker v2 images. Skopeo works with API V2 container image registries such as docker.io and quay.io registries, private registries, local directories and local OCI-layout directories. 

Skopeo - Work with remote images registries - retrieving information, images, signing content

nerdctl is a Docker-compatible CLI for containerd.

nerdctl - Docker-compatible CLI for containerd, with support for Compose

rage is a simple, modern, and secure file encryption tool, using the age format. It features small explicit keys, no config options, and UNIX-style composability.

rage - Simple, modern, and secure file encryption tool, using the age format

runc is a CLI tool for spawning and running containers according to the OCI specification.

runc - CLI tool for spawning and running containers according to the OCI specification

doggo is a modern command-line DNS client (like dig) written in Golang. It outputs information in a neat concise manner and supports protocols like DoH (DNS over HTTPS), DoT (DNS over TLS) and DNSCrypt as well. It supports multiple resolvers at once, Reverse DNS Lookups, Shell completions for zsh and fish.


doggo - Command-line DNS client for human

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