Faker, a port of Data::Faker from Perl, is used to easily generate fake data: names, addresses, phone numbers, etc.

Ffaker generates dummy data.

Easy and customizable generation of forged data. Can be used as a gem or a rails plugin. Includes rails generators for creating your own forgeries.

Library for generating random strings from regular expressions.

Data anonymization tool for RDBMS and MongoDB databases

This gem allows you to easily dump and transform subset of your ActiveRecord models and their relations.

Random data generator

A replacement for various lorem ipsum generators.

**CheapRandom** is a set of tools for pseudo random number generation from arbitrary data. The properties of the **CheapRandom seed** make convenient random number generation possible -- useful for easily repeatable software testing. The **CheapRandom algorithm** is information conserving and generally appears to produce lower chi-squared statistics than **Kernel::rand** i.e. it appears to be more random. The **CheapRandom algorithm**, an original work by Bardi Einarsson, has been in use for 6 years.