Top 7 Kotlin Scala Projects

intellij-rainbow-brackets

19 4,329 7.9 Kotlin

🌈Rainbow Brackets for IntelliJ based IDEs/Android Studio/HUAWEI DevEco Studio/Fleet

Project mention: Changing my relationship with GitHub Copilot | news.ycombinator.com | 2023-08-28

Gradle buildSrcVersions

8 1,621 8.8 Kotlin

Life is too short to google for dependencies and versions

Project mention: Dependency Managers Don't Manage Your Dependencies (2021) | news.ycombinator.com | 2023-06-19

Lately I've been using gradle with kotlin-js and a mix of npm and jvm dependencies. There's the https://splitties.github.io/refreshVersions/ plugin that I can recommend if you are using gradle (with or without kotlin-js).
It manages plugin dependencies, library dependencies, and version dependencies. It can use the new gradle version catalog or not if you prefer. On first use, you migrate your versions and it extracts these to a versions.properties (or your version catalog). Then whenever you run refreshVersions it indicates available new versions in comments in this file. It also indicates unused dependencies. Though for npms this is a bit harder. All you need to do is manually use the versions you want.
I run this frequently to stay on top of upstream changes. Few software engineers realize that the testing and integration overhead with version changes multiplies (just like with other forms of change). Libraries that you haven't updated amount to technical debt that you haven't addressed. So, the workload increases massively if you don't update for a while. Staying up to date minimizes the workload. This plugin makes that super easy.
Given that we are using kotlin-js, we have to deal with a rapidly evolving library ecosystem so we do have occasional issues that we need to work around by either downgrading or fixing some code. Whenever I can't update something, I document it in my versions.properties with a comment. Often you just have to wait for the next release or so for things to straighten out. The price of using cutting edge software.
Kotlin-js manages a yarn lock file as well. So it properly locks dependencies. Whenever you update npm dependencies, you have to run a command to upgrade the lock file. There's also a whole mess of webpack dependencies that comes along with kotlin-js.

InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
dependency-analysis-gradle-plugin

9 1,602 9.6 Kotlin

Gradle plugin for JVM projects written in Java, Kotlin, Groovy, or Scala; and Android projects written in Java or Kotlin. Provides advice for managing dependencies and other applied plugins

Project mention: Recommended dependency analyzer plugin | /r/androiddev | 2023-05-05

Zircon

10 741 8.2 Kotlin

Zircon is an extensible and user-friendly, multiplatform tile engine.

Project mention: Java swing turn based roguelike game loop advice | /r/roguelikedev | 2023-05-24

I'd recommend you use Zircon, it's THE roguelike rendering library for Kotlin/JVM. The developer is/was active on the discord too. Zircon website

kotlin-spark-api

3 437 4.9 Kotlin

This projects gives Kotlin bindings and several extensions for Apache Spark. We are looking to have this as a part of Apache Spark 3.x
xef

1 163 9.5 Kotlin

Building applications with LLMs through composability, in Kotlin, Scala, ...

Project mention: Q: Scala-based app to access ChatGPT-3 ? | /r/scala | 2023-12-06

selfie

0 31 9.9 Kotlin

Snapshot testing for Java, Kotlin, and the JVM (by diffplug)
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.

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).