Apps to Desktop Color Picker

Agave is a lightweight, open-source color scheme generator for designers and developers, offering tools to create, manage, and extract color palettes from various sources, particularly images.

gcolor2 is a minimalist and lightweight color selector tool for Linux, providing a simple interface to pick colors from the desktop or predefined palettes and generate various color codes.

ZScreen, also known as ShareX, is a powerful open-source screen capture and file sharing utility for Windows. It allows users to capture areas of their screen, annotate images, and automatically upload them to various online services. While officially discontinued under the 'ZScreen' name, the project lives on as ShareX.

GPick is a powerful and versatile color picker and palette editor designed for graphic designers, web developers, and artists. It offers a comprehensive suite of tools to identify, select, mix, and manage colors across various formats, including real-time desktop color picking and extraction from images.

ShareX is a free and open-source utility for capturing and sharing screenshots, screen recordings, and various other forms of content. It offers a wide array of tools for image manipulation, file uploads, and automation, making it an incredibly versatile application.