Ghidra is a software reverse engineering (SRE) framework

A Java 8+ Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)

TrackerControl Android: monitor and control trackers and ads.

An NFC research toolkit application for Android

The Web Application Hacker's Handbook - Extra Content

An Android app that lets you use your access control card cloning devices in the field.

This Android app collects Mag-Stripe data and CVC3 codes from PayPass cards and emulates that information.

Native Android Proxmark3 client (no root required)

Open source Java Card applet that allows you to unlock, start, or lock a Tesla Model 3 just like the official key card

JCrypTool Core Plug-ins

Lelo F1s SDK: https://www.lelo.com/f1s-developers-kit-red

Android Java written application which reads and extracts contactless EMV paycard data using NFC and stores it into a Realm database.

Ever wondered what's stored on your public transport card?

SIM Password Manager

An Android app to read and write MIFARE Ultralight EV1 tags

Android App that genereates passcode authentication codes for Postfinance cards