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1.Kotlinx Coroutines Core13,385 usages

org.jetbrains.kotlinx » kotlinx-coroutines-core Apache

Coroutines support libraries for Kotlin
Last Release on May 9, 2026

2.Kotlinx Coroutines Android5,886 usages

org.jetbrains.kotlinx » kotlinx-coroutines-android Apache

Coroutines support libraries for Kotlin
Last Release on May 9, 2026

3.RxJava1,113 usages

io.reactivex.rxjava3 » rxjava Apache

Reactive Extensions for Java
Last Release on Sep 24, 2025

4.Awaitility4,663 usages

org.awaitility » awaitility Apache

A Java DSL for synchronizing asynchronous operations
Last Release on Feb 21, 2025

5.Spark Project Core2,841 usages

org.apache.spark » spark-core Apache

Core libraries for Apache Spark, a unified analytics engine for large-scale data processing.
Last Release on Jun 12, 2026

6.AtomicFU2,731 usages

org.jetbrains.kotlinx » atomicfu Apache

The idiomatic way to use atomic operations in Kotlin.
Last Release on May 30, 2026

7.Apache Hadoop Client Aggregator1,793 usages

org.apache.hadoop » hadoop-client Apache

Apache Hadoop Client aggregation pom with dependencies exposed
Last Release on Mar 24, 2026

8.Non Blocking Reactive Foundation For The JVM2,489 usages

io.projectreactor » reactor-core Apache

Non-Blocking Reactive Foundation for the JVM
Last Release on Jun 8, 2026

9.Vert.x Core1,905 usages

io.vertx » vertx-core Apache +1

The Vert.x core APIs contain the backbone for writing Vert.x applications and low-level support for HTTP, TCP, UDP, file system, asynchronous streams and many other building blocks.
Last Release on Jul 13, 2026

10.Akka Actor2,237 usages

com.typesafe.akka » akka-actor BUSL

Akka is a toolkit for building highly concurrent, distributed, and resilient message-driven applications for Java and Scala.
Last Release on Aug 15, 2025