This gem generates UPI QR codes for payments. It can be used in e-commerce applications to generate QR codes for payments. The QR codes can be scanned by UPI apps to make payments. The gem uses the rqrcode gem to generate the QR codes.

Lightweight gem to build UPI deep links, validate VPAs, and generate QR codes — no payment gateway, no merchant account, just link generation for direct P2P-style UPI collection.

Supports local development for Vae Platform (http://vaeplatform.com/)

Virtual name card for online video systems.

A gem to make visual test

VizReview SDK for Ruby. Easy integration of visual regression testing.

Vulkan bindings for Ruby

Vulture captures and compares screenshots of web pages at multiple resolutions, highlighting visual differences.

WatchDoge is RubyOnRails-friendly web frontend regression test tool

A pure-Ruby ZPL II renderer. Parses ^XA..^XZ label formats and rasterizes them at true printer resolution (dots), producing PNG images and print-size PDF documents. Code 128 (^BC, incl. Zebra subset invocation codes and GS1 modes), QR (^BQ), Code 39 (^B3) and Interleaved 2 of 5 (^B2) are generated module-exact so scanners read them reliably. Also supports text fields, field blocks, graphic boxes/circles/diagonals, ^GF images (ASCII hex, Zebra RLE, B64/Z64) and ~DG/^XG stored graphics.