App that sends a push notification a couple hours later

Kotlin/Native infrastructure

A library that gives depth to Views.

Android's RenderThread wrapper

SVG icon animation tool for Android, iOS, and the web

An Android audio management library for real-time communication apps.

A time-traveling bytecode rewriter which adds future APIs to android.jar

svgcleaner could help you to clean up your SVG files from the unnecessary data.

A Java example for Antlr4

The Kotlin Programming Language.

A sample Android application that demonstrates how to implement various visual effects.

Framework for quickly creating connected applications in Kotlin with minimal effort

Kotlin multiplatform I/O library

CryptoSwift is a growing collection of standard and secure cryptographic algorithms implemented in Swift

Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

Open source RabbitMQ: core server and tier 1 (built-in) plugins

Kotlin multiplatform / multi-format serialization

Aion Network - Java Implementation

Cashew is a real-time communications backend for connected applications.

Complimenting code to Java Crypto Blog series, at https://www.veracode.com/blog/research/how-get-started-using-java-cryptography-securely

A Kotlin API for generating .kt source files.

Multiplatform Kotlin application of KotlinAcademy

General data-binding package for Jackson (2.x): works on streaming API (core) implementation(s)

A set of Kotlin extensions for Android app development.

Android SQLite API based on SQLCipher

Square’s meticulous HTTP client for the JVM, Android, and GraalVM.

Set of Kotlin APIs to make graphics math easier to write.

Converts SVG files to Android VectorDrawables

Dex to Java decompiler

ARCore SDK for Android Studio