Metrodroid can read information from some public transport NFC smartcards. It was formerly known as Farebot M.

This is a fork of Eric Butler’s Farebot project, with support for additional cards and bug fixes. A list of supported cards can be found here.

You require a NFC-compatible phone in order to read cards.

You need a NXP NFC chipset in your phone in order to read MIFARE Classic cards. Some phones have NFC chips from other manufacturers, which do not read Mifare Classic cards (eg: Nexus 4