The best open source alternative to Google Wallet is FossWallet. If that doesn't suit you, our users have ranked more than 50 alternatives to Google Wallet and 11 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Google Wallet are PassAndroid, Cardabase, Wallet (by sidhant947) and fWallet.
FossWallet is a free and open source (foss) .pkpass application. Inspired by the venerable PassAndroid-App, I tried to recreate the necessary functionality in Material Design 3 and with modern technologies.
Displays esPass (.esPass) & Passbook (.pkpass) files, shows the Barcode (QR, PDF417, AZTEC, Code 39 and Code 128 format) and is also usable offline.
Cardabase is your digital wallet for loyalty cards. Save all your shop cards in one secure place and access them instantly.
Tired of juggling multiple physical cards? Simplify your life with our Card Wallet app. Keep all your cards in one secure, convenient place, accessible anytime, anywhere. Just Tap on Card to copy details for fast transactions.
GroestlCoin (GRS) is a peer-to-peer Internet cryptocurrency utilizing the Groestl algorithm that enables instant payments to anyone in the world. GroestlCoin makes efficient mining possible for EVERYBODY who wants to mine – whether on an old CPU or a new GPU.
Explorer of DUniter communities network, to certify trusted peers, to generate an universal dividend, to send & receive transactions from anyone. Multi-currency-wallet for the currencies based on UCP - DUniter Protocol :
Peercoin is a P2P digital currency and payment system optimized for security and energy-efficiency.
Unofficial app that is fully open source. This app is a simple to use PDF Wallet. That means it takes over the task to store and display your most important PDF certificates. It includes a convenient fullscreen barcode rendering, if a barcode is present in the PDF.
MultiDoge is a desktop Dogecoin client, powered by dogecoinj. Ported from the MultiBit Bitcoin client.
Germany
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It doesn't hold payment cards, so you can't tap it. It only holds passcards, such as for public transport, or those with a barcode that can be scanned.