39Licenses & third parties
| Component | License | Usage |
|---|---|---|
| BWIPP / bwip-js (© Terry Burton, Mark Warren) | MIT | Parts of the barcode encoders (postal codes, stacked and 2D symbologies, Composite, GS1 tables) and the reference matrices of the tests |
| zint (© Robin Stuart et al.) | BSD-3-Clause | Ports of, among others, Korea Post, Mailmark 4-State, DPD, UPU S10, Flattermarken, UPNQR, Grid Matrix and Code One |
| ZXing.Net | Apache-2.0 | Building blocks for QR, Data Matrix, PDF417, Aztec and EAN/UPC; second decoder of scan-proof and Vector-Lift, used in the tests to read barcodes back |
| zxing-cpp / ZXingCpp | Apache-2.0 | Decoder of scan-proof and Vector-Lift (reading only) |
| PDFium (bblanchon.PDFium) | BSD-3-Clause / Apache-2.0 | ZplCore.VectorLift only: reading PDFs and rendering the reference |
| GS1 Barcode Syntax Dictionary, Digital Link compression tables | Apache-2.0 | Key/attribute rules of GS1 Digital Link, reading legacy compressed URIs |
| Okapi Barcode | Apache-2.0 | Thresholds of the QR mode selection |
| SkiaSharp, HarfBuzzSharp | MIT | Rendering, text shaping |
| Roboto Condensed | SIL OFL 1.1 | Replacement for Zebra font 0 |
| DejaVu Sans / Sans Mono | Bitstream Vera / DejaVu license (free) | Replacement for fonts A–H, human-readable text |
Derived files carry a header comment. Full texts: THIRD-PARTY-NOTICES.md