There are 4 repositories under android-nfc topic.
An Android NFC app for reading, writing, analyzing, etc. MIFARE Classic RFID tags.
An easy to use NFC library for Android
Includes both NFC card emulator and NFC card reader implementation
Java and Android library wrapper around the functionality of the Mifare Classic Tool library for Android.
Demo Android application for the Mifare Classic Tool library: https://github.com/maxieds/MifareClassicToolLibrary
Nfc Streaming API for Android
*WORK IN PROGRESS* Helper classes for working with specific NFC tags on Android