Unprecompose is a script for Adobe After Effects that allows users to easily break down precomposed layers into individual layers.

You can reuse pre-composed elements across different compositions within the same project.

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Choose the layers you want to pre-compose in the timeline.

If you're looking for free alternatives or trials, Adobe provides free trials for its software, including After Effects, allowing you to test the software before committing to a purchase. There are also free and open-source alternatives to After Effects, such as Blender, Shotcut, and Lightworks, though they may have a learning curve and lack some of the advanced features of After Effects.