1. boundstoneHigh Performance / Fast Compilation / Lightweight MCBE Server
2. KookieA server software for Minecraft: Bedrock Edition written in Kotlin
3. RapidPMHigh performance extension that implements parts of PocketMine-MP (PMMP) with Zephir
4. KotlinInside비공식 디시인사이드 API (Kotlin (Java)) / Unofficial DCInside API written in Kotlin