This is a gem for using ActiveRecord more explicitly.

Exportable will help you in exporting ActiveRecord models in to different output formats including CSV, XLS etc.

A simple gem for export data to other format

Adds a class method to all ActiveRecord models in Rails that exports all rows in a single CSV file to an Amazon S3 bucket

Export model data to Google Spreadsheets or Excel through Apache POI

Easy exposition of has_one associations at the object level, to avoid nesting.

A Rails engine that exposes ActiveRecord models as JSON API with minimum hassle

Gain fined tuned control over what users are permitted to see and do in your application.

Provides application owners and admins with analytics for user behavior and important system statistics that can only be gleaned from the operational database.

Add settings to an app express module

Syntactic sugar for using a subquery and left outer join in ActiveRecord

make easier win32api module

A Rails gem that provides a clean way to associate external IDs from third-party systems with your ActiveRecord models using polymorphic associations.

Extface allows use of Cash Registers, Fiscal and POS printers without physical connection between the device, application server and the end user. Can also be used for remotely reading CDR logs from PBX systems and actually supports data exchange with all low-speed devices having serial, parallel...

An extension of simple_form, add layout function and add input controls based on bootstraps.

Rails 3 Renderer for JSON compatible with Sencha Extjs 3+

ExtR is an Rails 4.x Ext Direct Router with View Helpers and some adjustment abilities.

A simple alternative to acts_as_eav_model. Use JSON to store extra attrubutes.

Logs into CVS account, adds coupons with due dates to OmniFocus, remembers imported coupons

Simple way to do validations more clear :)