There are numerous open-source plugins and software available that offer video editing and color grading capabilities. While they may not provide the exact features of Excalibur, they can be a viable alternative for those on a tight budget.
Some of the standout features of the Excalibur plugin include:
The official plugin is available for on the developer's website. While there is no permanent free version, the community occasionally shares free preset packs designed to work alongside it. Free Alternatives to Excalibur