Apps to Custom Data Fields

GNOME Planner is a free and open-source project management software designed for individuals and small teams. It leverages the Work Breakdown Structure (WBS) methodology and provides tools for task management, resource allocation, and progress tracking.

LibreOffice Base is a robust desktop database application designed to streamline the process of creating, managing, and querying databases. It provides an intuitive interface suitable for both beginners and experienced users, facilitating easy data handling and reporting.

ProcessWire is a powerful and flexible open-source CMS and framework for building websites and web applications. Known for its elegant API and developer-friendly architecture, it offers a robust solution for managing content at any scale with emphasis on customization and ease of use.