Tools I use during the day. Some are just for learning and research, other help to improve my work day.

7-ZipLGPL7-Zip is a file archiver with a high compression ratio. You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. 7-Zip works for Windows 7, Vista, XP, 2008, 2003, 2000, NT, ME, and 98. And there is a port of the command line version to Linux/Unix. Most of the source code is under the GNU LGPL license. The unRAR code is under a mixed license with GNU LGPL + unRAR restrictions. Check the license for details.
AnsibleGPLAnsible is a radically simple IT automation engine that automates cloud provisioning, configuration management, application deployment, intra-service orchestration, and many other IT needs.
Ansible LintGPLAnsible Lint is a command-line tool for linting playbooks, roles and collections aimed towards any Ansible users. Its main goal is to promote proven practices, patterns and behaviors while avoiding common pitfalls that can easily lead to bugs or make code harder to maintain.
Apache JMeterApache 2.0The Apache JMeter™ application is open source software, a 100% pure Java application designed to load test functional behavior and measure performance. It was originally designed for testing Web Applications but has since expanded to other test functions.
AsciidoctorMITAsciidoctor is a fast, open source, Ruby-based text processor for parsing AsciiDoc® into a document model and converting it to output formats such as HTML 5, DocBook 5, manual pages, PDF, EPUB 3, and other formats.
Beyond CompareCommercialCompare files and folders using simple, powerful commands that focus on the differences you're interested in and ignore those you're not.
BlenderGPLBlender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing and motion tracking, even video editing and game creation.
ChangeScreenResolutionchange specific aspects of one / more / all display: width and / or height (screen resolution), frequency, bits per pixel (color depth)
config-lintMITA command line tool to validate configuration files using rules specified in YAML. The configuration files can be one of several formats - Terraform, JSON, YAML, with support for Kubernetes. There are built-in rules provided for Terraform, and custom files can be used for other formats.
CyberChefApache 2.0The Cyber Swiss Army Knife. CyberChef is a simple, intuitive web app for carrying out all manner of "cyber" operations within a web browser. These operations include simple encoding like XOR and Base64, more complex encryption like AES, DES and Blowfish, creating binary and hexdumps, compression and decompression of data, calculating hashes and checksums, IPv6 and X.509 parsing, changing character encodings, and much more.
diveMITA tool for exploring a docker image, layer contents, and discovering ways to shrink the size of your Docker/OCI image.
FileZillaGPL 2.0The FileZilla Client not only supports FTP, but also FTP over TLS (FTPS) and SFTP.
Firefox Container ProxyBSD-2-ClauseAllows Firefox user assign different proxies to be used in different containers
GhidraApache 2.0A software reverse engineering (SRE) suite of tools developed by NSA's Research Directorate in support of the Cybersecurity mission
gitGPLGit is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency.
GoAccessMITGoAccess is an open source real-time web log analyzer and interactive viewer that runs in a terminal on *nix systems or through your browser. It provides fast and valuable HTTP statistics for system administrators that require a visual server report on the fly.
gronMITMake JSON greppable! gron transforms JSON into discrete assignments to make it easier to grep for what you want and see the absolute 'path' to it. It eases the exploration of APIs that return large blobs of JSON but have terrible documentation.
IBM Thread and Monitor Dump Analyzer for JavaPropritaryIBM Thread and Monitor Dump Analyzer for Java (TMDA) is tool that allows identification of hangs, deadlocks, resource contention, and bottlenecks in Java thread dumps.
IstioAapche 2.0Istio extends Kubernetes to establish a programmable, application-aware network using the powerful Envoy service proxy. Working with both Kubernetes and traditional workloads, Istio brings standard, universal traffic management, telemetry, and security to complex deployments.
Java DecompilerGPLJD-GUI is a standalone graphical utility that displays Java source codes of “.class” files. You can browse the reconstructed source code with the JD-GUI for instant access to methods and fields.
jqMITjq is like sed for JSON data - you can use it to slice and filter and map and transform structured data with the same ease that sed, awk, grep and friends let you play with text
K6AGPL-3.0Grafana k6 is an open-source load testing tool that makes performance testing easy and productive for engineering teams. k6 is free, developer-centric, and extensible.
K9sApache 2.0K9s provides a terminal UI to interact with your Kubernetes clusters. The aim of this project is to make it easier to navigate, observe and manage your applications in the wild. K9s continually watches Kubernetes for changes and offers subsequent commands to interact with your observed resources.
KeyStore ExplorerGPLKeyStore Explorer is an open source GUI replacement for the Java command-line utilities keytool and jarsigner. KeyStore Explorer presents their functionality, and more, via an intuitive graphical user interface.
kubectx, kubensApache 2.0kubectx is a tool to switch between contexts (clusters) on kubectl faster. kubens is a tool to switch between Kubernetes namespaces (and configure them for kubectl) easily.
kubetailApache 2.0Bash script that enables you to aggregate (tail/follow) logs from multiple pods into one stream. This is the same as running "kubectl logs -f " but for multiple pods.
LanguageToolLGPL-2.1Open Source proofreading software for English, French, German, Polish, Russian, and more than 20 other languages. It finds many errors that a simple spell checker cannot detect.
LaTeXLPPLLaTeX is a high-quality typesetting system; it includes features designed for the production of technical and scientific documentation. LaTeX is the de facto standard for the communication and publication of scientific documents. LaTeX is available as free software.
MarkdownMarkdown is a text-to-HTML conversion tool for web writers. Markdown allows you to write using an easy-to-read, easy-to-write plain text format, then convert it to structurally valid XHTML (or HTML).
mitmproxyMITmitmproxy is a set of tools that provide an interactive, SSL/TLS-capable intercepting proxy for HTTP/1, HTTP/2, and WebSockets.
MkDocsBSD-2-ClauseMkDocs is a fast, simple and downright gorgeous static site generator that's geared towards building project documentation. Documentation source files are written in Markdown, and configured with a single YAML configuration file.
Multi Account ContainerMPL 2.0The Firefox Multi-Account Containers extension lets you carve out a separate box for each of your online lives – no more opening a different browser just to check your work email!
OBS StudioGPL 2.0Free and open source software for video recording and live streaming.
OWASP Zed Attack Proxy (ZAP)Apache 2.0The OWASP Zed Attack Proxy (ZAP) is one of the world’s most popular free security tools and is actively maintained by a dedicated international team of volunteers. It can help you automatically find security vulnerabilities in your web applications while you are developing and testing your applications. It's also a great tool for experienced pentesters to use for manual security testing.
podmanApache 2.0Podman is a daemonless container engine for developing, managing, and running OCI Containers on your Linux System. Containers can either be run as root or in rootless mode.
popeyeApache 2.0Popeye is a utility that scans live Kubernetes cluster and reports potential issues with deployed resources and configurations. It sanitizes your cluster based on what’s deployed and not what’s sitting on disk. By scanning your cluster, it detects misconfigurations and helps you to ensure that best practices are in place, thus preventing future headaches. It aims at reducing the cognitive overload one faces when operating a Kubernetes cluster in the wild. Furthermore, if your cluster employs a metric-server, it reports potential resources over/under allocations and attempts to warn you should your cluster run out of capacity.
PortSwigger Burp SuitePropritaryEssential manual toolkit - perfect for learning more about AppSec.
SAML-tracerBSD-2-ClauseSAML-tracer is a Firefox extension that aims to make debugging of SAML- and WS-Federation-communication between websites easier. It is a request logger that in addition to showing normal requests, also highlights and decodes SAML messages that are transmitted.
SeleniumApache 2.0Selenium is an umbrella project encapsulating a variety of tools and libraries enabling web browser automation. Selenium specifically provides an infrastructure for the W3C WebDriver specification — a platform and language-neutral coding interface compatible with all major web browsers.Browser automation, Python
sternApache 2.0Stern allows you to tail multiple pods on Kubernetes and multiple containers within the pod. Each result is color coded for quicker debugging. The query is a regular expression so the pod name can easily be filtered and you don't need to specify the exact id (for instance omitting the deployment id). If a pod is deleted it gets removed from tail and if a new pod is added it automatically gets tailed. is a free command line tool which checks a server's service on any port for the support of TLS/SSL ciphers, protocols as well as recent cryptographic flaws and more.
TrivyApache 2.0Trivy (tri pronounced like trigger, vy pronounced like envy) is a simple and comprehensive vulnerability/misconfiguration/secret scanner for containers and other artifacts. Trivy detects vulnerabilities of OS packages (Alpine, RHEL, CentOS, etc.) and language-specific packages (Bundler, Composer, npm, yarn, etc.). In addition, Trivy scans Infrastructure as Code (IaC) files such as Terraform and Kubernetes, to detect potential configuration issues that expose your deployments to the risk of attack. Trivy also scans hardcoded secrets like passwords, API keys and tokens. Trivy is easy to use. Just install the binary and you're ready to scan. All you need to do for scanning is to specify a target such as an image name of the container.
yamllintGPLA linter for YAML files. yamllint does not only check for syntax validity, but for weirdnesses like key repetition and cosmetic problems such as lines length, trailing spaces, indentation, etc.