1.zxing / zxingZXing ("Zebra Crossing") barcode scanning library for Java, Androidjavaandroidbarcodebarcode-scannerzxingqr-code+2 moreJavaAPACHE-2.034K total9.4K forks+90 starsfrom 34,091 · score 4.51
2.nayuki / QR-Code-generatorHigh-quality QR Code generator library in Java, TypeScript/JavaScript, Python, Rust, C++, C.qr-codeqr-generatorc-plus-plusjavapythonjavascript+5 moreJavaNo license6.8K total1.3K forks+26 starsfrom 6,780 · score 3.30