A sinatra plugin to specify a default charset for all responses (applied to the content_type header)
Sinatra REST API generator
Simple, secure sessions for Sinatra
Classy web-development dressed in a DSL (official / canonical repo)
A light extension for using redis with Sinatra
A multi-app web-app DSL derived from Sinatra, riding on rack
HTTP Accept* for Ruby/Rack
Separate routes for subdomains in Sinatra apps
Meta tags helpers for Rails
CORS support for Sinatra applications
Sinatra app for serving web fonts easily with proper caching and access-control headers
Making HTML emails comfortable for the Ruby rockstars
A plugin for Sinatra to provide a DSL extension for using Thin for asynchronous responses
Parameter Validation & Type Coercion for Sinatra
All the extras that Sinatra prefers while performing