Motlin
Motlin is a library mod for Fabric and NeoForge that bundles Kotlin libraries for other mods to use, so developers do not have to ship their own copies.
What it does
Motlin supplies a set of Kotlin libraries that other mods depend on. The bundled packages are the Kotlin standard library, Kotlin reflection, Kotlin coroutines core, Kotlin serialization for JSON, and KotlinX DateTime. Two catalog mods, Colorful Paradise and IleafCore, require it. The mod adds no new blocks, mobs or dimensions of its own, so players will not see new content in the game itself.
Installation covers the server and each player's game. Files are published for Fabric and NeoForge, with 1.0 for 26.2 as the latest build of each, dated 2026-06-22. Game versions with files are 26.1, 26.1.1, 26.1.2 and 26.2, and the mod is released under All rights reserved, so it is not open source. It was first published on 2026-06-18 by IleafDevelopment, part of the IleafMC Team.
Key features
Kotlin standard library
The Kotlin standard library is bundled so that dependent mods can use Kotlin's core collections, text and utility functions.
Kotlin reflection and coroutines
Kotlin reflection and coroutines core are included, letting dependent mods inspect types and run asynchronous code.
Serialization and date handling
Kotlin serialization for JSON and KotlinX DateTime are bundled for mods that read or write JSON data and work with dates and times.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Required by 2 mods
Use cases
Mods written in Kotlin
A mod written in Kotlin can rely on Motlin for its runtime libraries, so its own file stays smaller.
Who it’s for: Mod developers who write in Kotlin and want shared runtime libraries, and players who install Colorful Paradise or IleafCore, which need Motlin to start.
How it compares
FilloaxLib is open source under the MIT License, with Fabric and NeoForge files for 1.21 – 26.3, and it runs on client and server. IbukiGourd is also open source under the MIT License, with files for 1.21.4 – 26.2 on Fabric and NeoForge. KotlinLangForge is open source under the GNU General Public License v3.0 only and is optional on either side, with Forge and NeoForge files for 1.16.3 – 26.3. Motlin is not open source and is required on both the server and the client.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Motlin | Fabric and NeoForge | 26.1 – 26.2 | Client and server | 2026-06-22 |
| FilloaxLib | Fabric and NeoForge | 1.21 – 26.3 | Client and server | 2026-09-28 |
| IbukiGourd | Fabric and NeoForge | 1.21.4 – 26.2 | Client and server | 2026-10-04 |
| KotlinLangForge | Forge and NeoForge | 1.16.3 – 26.3 | Client or server, optional | 2026-10-08 |
Questions
Which loaders does Motlin support?
Does a server need Motlin installed?
Which mods require Motlin?
In the catalog
Motlin is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 13,894 mods support Minecraft 26.2.
More from IleafDevelopment
Similar mods
What the author says
Looking for new blocks, mobs, or dimensions? Sorry, this mod only brings Kotlin libraries so other mods can do the cool stuff. 😄 Developed by the IleafMC Team which is a part of IleafDevelopment. Stay in touch
Official listing
- Modrinth page
- modrinth.com/mod/motlin
- Owner
- IleafDevelopment
- Published
- 2026-06-18
- Updated on Modrinth
- 2026-06-22
- Facts verified
- 2026-10-15