An image loading and caching library for Android focused on smooth scrolling

A private messenger for Android.

A Java serialization/deserialization library to convert Java Objects into JSON and back

A fast dependency injector for Android and Java.

Logstash - transport and process your logs, events, or other data

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.

Multi-platform transparent client-side encryption of your files in the cloud

jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.

Views and Drawable for displaying animated GIFs on Android

A programmer-oriented testing framework for Java.

Floating Action Button for Android based on Material Design specification

An implementation of tap targets from the Material Design guidelines for feature discovery.

Joda-Time is the widely used replacement for the Java date and time classes prior to Java SE 8.

Android client SDK for communicating with OAuth 2.0 and OpenID Connect providers.

Project Wycheproof tests crypto libraries against known attacks.

Fluent assertions for Java and Android

Android widget that can render PDF documents stored on SD card, linked as assets, or downloaded from a remote URL.

Chrome custom tabs examples

Provides a tab switcher similar to the one, which is used in Google Chrome on Android

The Wikimedia Commons Android app allows users to upload pictures from their Android phone/tablet to Wikimedia Commons

The Android Browser Helper library helps developers use Custom Tabs and Trusted Web Activities on top of the AndroidX browser support library.

Spongy Castle - a repackage of Bouncy Castle for Android (which ships a crippled version of BC)

EDS "lite" edition

Cryptography Android application code samples / cipher collection for app users

Simple to use OpenPGP API based on Bouncy Castle

Lightweight Android app that simulates your native app role during App Flip

Wifi Key View for Android

Android app for monitoring Eaton and APC UPS devices statuses and view events (UPS => Uninterruptible power supply) supports APC network management card, synology upsc

Network Security Services for Java is a Java interface to NSS

Android implementation of the famous Enigma machine