Gravity Zones
The Gravity Zones mod was inspired by Robinton's "Low Gravity" development and was implemented at the request of user MineCrak.
This addon provides the ability to configure special zones with modified gravity on the server, after which these parameters are transmitted to clients.

In addition to adjusting gravity strength, you can regulate many other environmental characteristics, including oxygen levels, cloud height, and sky color.
Compatibility
The mod is fully compatible with Cubic Chunks and Cubic World Gen, and also works excellently with the standard version of Minecraft. Thanks to the fact that I also develop Forge Essentials, this addon integrates perfectly with the Forge Essentials multiworld system.
Video Review
Available Zone Parameters
String name // Zone name
double gravityFactor // Gravity coefficient
double fogFactor // Fog intensity
boolean rainDisabled // Rain disable
boolean thunderDisabled // Thunder disable
boolean sunsetDisabled // Sunset disable
boolean alwaysShowStars // Always show stars
int cloudHeight // Cloud height
AxisAlignedBB bounds // Zone boundaries
int dim // Dimension
Color fogColor // Fog color
Color skyColor // Sky color
Color horizonColorOverride // Horizon color override
Important note: The mod is currently incompatible with Advanced Rocketry and Galacticraft, as these mods also modify gravity in a similar way.
