Ransack is a rewrite of MetaSearch created by Ernie Miller and developed/maintained for years by Jon Atack and Ryan Bigg with the help of a great group of contributors. Ransack's logo is designed by Anıl Kılıç. While it supports many of the same features as MetaSearch, its underlying implementation differs greatly from MetaSearch, and backwards compatibility is not a design goal. Ransack enables the creation of both simple and advanced search forms for your Ruby on Rails application (demo source code here). If you're looking for something that simplifies query generation at the model or controller layer, you're probably not looking for Ransack (or MetaSearch, for that matter). Try Squeel instead.