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Jekyll is a static site generator written in Ruby, commonly used for personal blogs and GitHub Pages.

Nim is a statically typed, compiled programming language that combines performance with readability, and compiles to C, C++, or JavaScript.

k6 is an open-source load testing tool and SaaS for engineering teams to test the performance of their APIs.

Less is a backward-compatible language extension for CSS that allows for variables, nesting, and functions.

Mithril is a modern JavaScript framework for building single-page applications, known for its small size, fast performance, and simplicity.

Cucumber is a testing tool that supports Behavior-Driven Development (BDD), allowing collaboration between developers and non-developers using plain language.

Playwright is an open-source testing framework by Microsoft that enables end-to-end testing for modern web apps across multiple browsers with powerful automation features.

Portainer is a lightweight management UI for Docker and Kubernetes, allowing users to easily manage containers, images, volumes, and networks from a web interface.

LabVIEW is a system-design platform and development environment for a visual programming language from National Instruments.

Material-UI is a popular React component library that implements Google’s Material Design system to build responsive and visually consistent UIs.

Knockout is a standalone JavaScript implementation of the MVVM pattern with declarative bindings and automatic UI refresh.

Apache Maven is a build automation and project management tool primarily for Java projects, known for its use of a standardized project structure and dependency management.

Objective-C is a general-purpose programming language primarily used for macOS and iOS development before the rise of Swift, known for its dynamic runtime and Smalltalk-style messaging.

pfSense is an open-source firewall and router software based on FreeBSD, offering robust networking features, security, and VPN support for both home and enterprise use.

Sentry is an open-source error tracking and performance monitoring tool that helps developers identify, diagnose, and fix issues in real-time across web and mobile apps.

Godot is an open-source game engine for 2D and 3D game development, known for its flexibility and ease of use.

Nodemon is a utility for Node.js that automatically restarts the application when file changes in the directory are detected, enhancing development workflow.

Vala is a programming language that brings modern language features to GNOME developers while maintaining C-level performance and compatibility.

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes that synchronizes applications directly from Git repositories.

Twitter is a social media platform for sharing short messages, known as tweets, widely used for real-time news, updates, and community interaction.

Google is a multinational technology company offering search, cloud computing, advertising services, and tools for developers.

Read the Docs is a platform that automatically builds and hosts documentation for open-source projects, supporting versioned docs written in Sphinx or MkDocs.

Protractor is an end-to-end test framework for Angular and AngularJS applications, built on top of WebDriverJS to automate browser testing.

Cairo is a 2D graphics library that provides high-quality vector graphics rendering for multiple output devices, often used in desktop and embedded systems.