Do some browser detection with Ruby.

Precise and fast user agent parser and device detector, backed by the largest and most up-to-date agent and device database

HTTP User Agent parser

A simple, comprehensive Ruby gem for parsing user agent strings with the help of BrowserScope's UserAgent database

Adds the mobile format for rendering views for mobile device.

CrawlerDetect is a library to detect bots/crawlers via the user agent

Parse and process User Agents like a secret one

Rack middleware for redirecting unsupported user agents to "please upgrade" page

Rack middleware for choosing a version of an interface to render for given request

User agent parser

Device UserAgent Detector

A DSL for writing user agent profiles

Rack Middleware for filtering by user agent

Simply determines if a user agent is for a mobile device.