December 2020's release radar highlights exciting projects from the open source community, showcasing advancements across various technologies. Notable releases include PHP 8.0, which introduces new features like union types and named arguments to enhance web development, and Supabase 1.0, which simplifies backend creation with quick setup features. .NET 5.0 offers a comprehensive developer platform with updates to C# 9.0 and F# 5.0, skipping version 4.0 for clarity. Simple Icons 4.0 adds new and updated SVG icons, including a GitHub Sponsors icon. Cypress 6.0 improves browser testing with full network stubbing, while CircuitPython 6.0 expands microcontroller support and revamps network modules. WeeChat 3.0 enhances its extensible chat client with new options and fixes, and InfluxDB 2.0 optimizes IoT device monitoring with the new Flux query language. Matomo 4.0, formerly Piwik, delivers increased security and performance, while Micro 3.0, now M3O, streamlines cloud service development. These releases reflect the dynamic innovation and collaborative spirit of the developer community.