Mac OS X Softwares to Low memory usage

VLC Media Player is a free and open-source cross-platform multimedia player that plays most multimedia files as well as DVDs, Audio CDs, VCDs, and various streaming protocols. Known for its robust format support and stability, VLC is a favorite for playing virtually any media file without the need for external codecs.

Mongoose is a highly portable embedded web server library designed for IoT, embedded devices, and resource-constrained environments. It provides a robust and flexible framework for building web interfaces and network services directly into applications, supporting protocols like HTTP, HTTPS, WebSocket, MQTT, and more.

Hiawatha is a secure and flexible open-source web server designed for Unix-based systems. It stands out for its strong focus on security features and lightweight architecture, making it suitable for various web hosting needs.

Varnish Cache is a powerful, open-source HTTP reverse proxy and accelerator designed to speed up websites and web applications by caching content and reducing the load on backend servers. It's highly configurable and widely used for high-traffic sites.

Cherokee is a powerful, open-source web server known for its speed, configurability, and lightness. It's designed for modern web applications, offering high performance and a user-friendly configuration interface.

Recoll is a powerful and versatile desktop search tool for Unix-like systems, enabling users to quickly find documents and emails based on their content. It's known for its efficiency, extensive file type support, and a user-friendly graphical interface that minimizes technical overhead.

EPUBReader is a lightweight and efficient browser extension that allows users to open and read EPUB e-books directly within their web browser. It provides a simple and intuitive reading experience without requiring external software.

lighttpd is a high-performance open-source web server designed for speed and efficiency in demanding environments. Known for its low memory footprint and modular architecture, it's a popular choice for applications requiring rapid response times and resource optimization.

WinDjView is a high-performance, compact, and user-friendly DjVu document viewer for the Windows operating system. Designed for speed and efficiency, it allows users to quickly open and navigate DjVu files, offering a range of features for enhanced reading experience.

Skim is a free and open-source PDF reader and note-taker for macOS. Tailored for scientific use, it offers advanced annotation tools, robust export options, and tight integration with LaTeX, making it an ideal companion for academic research and professional document management.

Preview is the native image and PDF viewer for macOS. It offers essential tools for viewing, annotating, and basic editing of these file types directly within the Apple ecosystem. Designed for efficiency and low resource use, Preview provides a seamless and integrated experience for handling common document and image formats on Mac computers.

Firefox PDF Viewer (PDF.js) is an open-source, web standards-based PDF viewer embedded directly within the Firefox browser. It allows users to view PDF documents seamlessly without the need for external software or plugins, enhancing browser-based document handling and accessibility.

PDFsam Basic is a free, open-source, and incredibly useful tool for handling PDF files. It excels at core functions like merging, splitting, rotating, and mixing PDFs, offering a simple and intuitive interface for both simple and complex tasks. It's available across major operating systems and doesn't require an internet connection.

FBReader is a versatile and free ebook reader application supporting multiple formats including ePub, Kindle azw3, and fb2. It offers a customizable reading experience across different platforms with features like library management, synchronization, and text-to-speech.

NGINX is a high-performance web server and reverse proxy known for its efficiency, scalability, and low resource consumption. It excels at handling concurrent connections and is widely used for serving static content, load balancing, and as a foundation for modern web architectures.

Apache HTTP Server, widely known as Apache, is a robust, open-source web server software that has been the backbone of the internet for decades. It is highly configurable and extensible through its modular architecture, supporting a vast array of features for hosting websites and web applications.

Foxit Reader is a robust and feature-rich PDF reader and editor that provides users with a comprehensive set of tools for viewing, annotating, signing, and creating PDF documents. Known for its blend of performance and functionality, it caters to both casual users and professionals handling complex PDF workflows.