Obsqr

The most lightweight QR code readerMIT

QR Scanner (Privacy Friendly)

Scan QR codesGPL-3.0-only

WiFiKeyShare

Share Wi-Fi passwords with QR codes and NFC tagsGPL-3.0-or-later

lWS QR

lightweight Web Server QR code generator pluginMIT

tagdrop

Decode data URIs in QR codesGPL-3.0-only

QR & Barcode Scanner

QR and barcode scanner with all the features you need.Unlicense

QRStream

Transfer files and text via successive QR codesPublicDomain

Share my number via QR code

Share your contact information with easeGPL-3.0-or-later

QRCode & Barcode scanner

QR Code & Barcode scanner cross-platform applicationMIT

SecScanQR

The QR code scanner/generator that cares about your privacyGPL-3.0-only

Wifi QR Code Creator

View Wi-Fi credentials and share networks as QR codesGPL-3.0-only

BitShares Wallet

Use Smartcoins like bitBTC, bitUSD & bitEUR in 22 languages w/QR codes & moreGPL-3.0-only

andOTP

Time-based One-time Passwords (TOTP) from QR codes for two-factor authenticationMIT

UK COVID-19 Venue Check-in

Third-party app to check in to venues by scanning an NHS Test and Trace QR codeGPL-3.0-or-later

Lucia App

Lucia allows you to anonymously check in at events using QR code based tracing.EUPL-1.2

PassAndroid

View Passbook filesGPL-3.0-only

Barcode Scanner

Scan barcodes on products, or barcodes containing URLs, contact info, and so onApache-2.0

Loyalty Card Keychain

Manages barcode-based store/loyalty cards on your phoneGPL-3.0-or-later