FallingBlocks
This mod allows you to control gravity physics for most blocks in Minecraft. You can enable and disable physical falling for various blocks according to your preferences.
To configure, simply add the desired blocks in the format modname:block_name to the configuration file config/fallingblocks/config.json.
When activating the blacklist, the gravity system will be applied to all blocks except those you add as exceptions.
IMPORTANT: When using the blacklist, do not remove standard blocks like stone, dirt, or grass. Their exclusion may lead to serious performance issues in the game.