This library uses ImageMagick and RQRCode to create QR codes with rounded corners

Gem to generate QR code from text

masks is a ruby library and rails engine that adds simple, extensible auth to most applications. DO NOT USE

A ruby library for generating one time passwords and QR Codes

The admin section of Munificent

The dangerous fish

The Muræna API

Gem para integração com SEFAZ para emissão de NF-COM, incluindo geração de XML, assinatura digital, envio e consulta de notas fiscais de serviços de comunicação e telecomunicação

fir command tool, support iOS and Android

TOTP/HOTP CLI

Pages Core

Paperback is a library for creating printable paper backups of small amounts of sensitive data like cryptographic keys.

Ponsqb admin CLI.

A Ruby library for generating and manipulating PDF documents

easy work for deploy, dev

Ruby Gem to generate PNG files with QR codes in them

Prawn-qr is a prawn extension for creating QR Codes inside of a prawn document

Generate pretty QR code

putqr displays a QR code in your terminal.

Simple QR interface to pws gem. Helps to use your passwords on a smartphone.