Top 4 Java world-generation Projects

Terra

5 618 9.1 Java

Voxel world generation modding platform (by PolyhedralDev)
Iris

1 408 9.5 Java

World Generation through a new Iris (by VolmitSoftware)
WorkOS

workos.com sponsored

The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
ore-veins

1 22 0.0 Java

A minecraft mod that adds realistic, configurable ore veins
OreTweaker

6 19 4.2 Java

Add, remove, tweak and configure ore and underground generation features for Minecraft Forge

Project mention: Anyone knows a mod for ore generation depending on the biome? | /r/feedthebeast | 2023-07-10

Geolosys is quite good, but I've found an even better one: OreTweaker. If you want to check it out, here's the link curseforge.com/minecraft/mc-mods/ore-tweaker

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).