Adds core features so other engines can hook into the framework.

Barby creates barcodes.

Rodauth is Ruby's most advanced authentication framework, designed to work in all rack applications. It's built using Roda and Sequel, but it can be used as middleware in front of web applications that use other web frameworks and database libraries. Rodauth aims to provide strong security for ...

Render QR codes with Rails 3

fir.im command tool, support iOS and Android

Provides Rails integration for Rodauth authentication framework.

Add the ability to use the Google Authenticator with ActiveRecord.

Glues rQRCode together with chunky_png

OTP authentication for Devise

Prawn/QRCode simplifies the generation and rendering of QRCodes in Prawn PDF documents.

DANFE and DACTE pdf generator for Brazilian invoices and transportation docs.

TrustyCms is a simple and powerful publishing system designed for small teams. It is built with Rails and is similar to Textpattern or MovableType, but is a general purpose content management system--not merely a blogging engine.

DANFE pdf generator for Brazilian invoices.

https://github.com/0dayinc/pwn/README.md

A library for generating QR Codes for the e-invoice standard by ZATCA in Saudi Arabia.

A plugin that lets you document your servers in a datacenter

QR-bills support for swiss payments, for full documentation please refer to github repo: https://github.com/damoiser/qr-bills

Ruby gem for Qrcode generation of Pix (Pagamento Instantâneo Brasileiro - Banco Central do Brasil)

Time Based OTP/rfc6238 authentication for Devise

EPC QR code for SEPA payments in any format