Termux - a terminal emulator application for Android OS extendible by variety of packages.

Dex to Java decompiler

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

A tool for reverse engineering Android apk files

A standalone Java Decompiler GUI

The ZAP by Checkmarx Core project

MIT Deep Learning Book in PDF format (complete and parts) by Ian Goodfellow, Yoshua Bengio and Aaron Courville

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.

Tools to work with android .dex and java .class files

Stetho is a debug bridge for Android applications, enabling the powerful Chrome Developer Tools and much more.

No clever tagline needed.

A free, secure and open source app for Android to manage your 2-step verification tokens.

An asynchronous, callback-based Http client for Android built on top of Apache's HttpClient libraries.

A collection of source code generators for Java.

Android filters based on OpenGL (idea from GPUImage for iOS)

This is a library with components of Android L to you use in android 2.2

Epoxy is an Android library for building complex screens in a RecyclerView

Annotation-triggered method call logging for your debug builds.

Android and Java bytecode viewer

Asynchronous socket, http(s) (client+server) and websocket library for android. Based on nio, not threads.

Learning RxJava for Android by example

Tiny, easily embeddable HTTP server in Java.

Image Cropping Library for Android, optimized for Camera / Gallery.

Android Asynchronous Networking and Image Loading

Grafika test app

Install and run GNU/Linux on Android

Text editor - Notes & ToDo (for Android) - Markdown, todo.txt, plaintext, math, ..

[DEPRECATED] RecyclerView made simple

Advanced dialog solution for android

Set of extra Transitions on top of Jetpack Transitions Library