A mature Minecraft plugin API (not including an implementation), licensed under the MIT License. If you do not have Gradle installed then use ./gradlew for Unix systems or Git Bash and gradlew.bat for Windows systems in place of any 'gradle' command. Sponge will use a javac version of at least 11. If an older JDK is used to launch Gradle, JDK 11 will be downloaded automatically. SpongeAPI is the tool developers use to create plugins for the Sponge platform.
A Minecraft server written in C# with a large focus on concurrency (multi-threaded) and plugin support. Custom code provides new functionality to existing Minecraft features - this includes new biomes, realms, and populators. Has a robust and customizable terrain generator and easy plugin capabilities for new features.