MIFARE Classic Tool

A free, open source Android app from heaven for NFC developers: MCT. Discussion here. MCT allows exporting and importing tag data and keys in a fast and intuitive way (most well-known factory keys are included!). Other functions include value and access condition calculators.

Reading public EMV data on a VISA card

The JavaEmvReader project provides a quick and simple way to parse the unsecured information on a VISA card - a bit easier than the alternative mentioned in a previous post.

One example application is described with the embedded element and Google Wallet in a Samsung Nexus S.

Accessing mobile SE in Android

Excellent, detailed tutorial on how to access the embedded secure element in an Android 4.x phone, and the followup on actually sending APDUs to it.