JCommander is a very small Java framework that makes it trivial to parse command line parameters. You annotate fields with descriptions of your options.


JCommander - Command line parsing framework for Java

Cobra is both a library for creating powerful modern CLI applications as well as a program to generate applications and command files. Cobra is a library providing a simple interface to create powerful modern CLI interfaces similar to git & go tools.
 
It provides: 
<ul>
<li>Easy subcommand-based CLIs: <code>app server</code>, <code>app fetch</code>, etc.</li>
<li>Fully POSIX-compliant flags (including short &amp; long versions)</li>
<li>Nested subcommands</li>
<li>Global, local and cascading flags</li>
<li>Easy generation of applications &amp; commands with <code>cobra init appname</code> &amp; <code>cobra add cmdname</code></li>
<li>Intelligent suggestions (<code>app srver</code>... did you mean <code>app server</code>?)</li>
<li>Automatic help generation for commands and flags</li>
<li>Automatic help flag recognition of <code>-h</code>, <code>--help</code>, etc.</li>
<li>Automatically generated bash autocomplete for your application</li>
<li>Automatically generated man pages for your application</li>
<li>Command aliases so you can change things without breaking them</li>
<li>The flexibility to define your own help, usage, etc.</li>
<li>Optional tight integration with <a href="http://github.com/spf13/viper">viper</a> for 12-factor apps</li>
</ul>

Cobra is both a library for creating powerful modern CLI applications as well as a program to generate applications and command files. Cobra is a library providing a simple interface to create powerful modern CLI interfaces similar to git & go tools.

Cobra - A Commander for modern Go CLI interactions

A command-line benchmarking tool (inspired by bench). If the program execution time is limited by disk I/O, the benchmarking results can be heavily influenced by disk caches and whether they are cold or warm.
 
Its features include: 
<ul>
<li>Statistical analysis across multiple runs.</li>
<li>Support for arbitrary shell commands.</li>
<li>Constant feedback about the benchmark progress and current estimates.</li>
<li>Warmup runs can be executed before the actual benchmark.</li>
<li>Cache-clearing commands can be set up before each timing run.</li>
<li>Statistical outlier detection to detect interference from other programs and caching effects.</li>
<li>Export results to various formats: CSV, JSON, Markdown, AsciiDoc.</li>
<li>Parameterized benchmarks (e.g. vary the number of threads).</li>
</ul>

A command-line benchmarking tool (inspired by bench). If the program execution time is limited by disk I/O, the benchmarking results can be heavily influenced by disk caches and whether they are cold or warm.

hyperfine - A command-line benchmarking tool

A code-searching tool similar to ack, but faster. It ignores file patterns from your .gitignore and .hgignore. If there are files in your source repo you don't want to search, just add their patterns to a .ignore file. (*cough* *.min.js *cough*)

The Silver Searcher - A code-searching tool similar to ack, but faster.

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 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

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

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

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