Schedules commands to be run with cron jobs on Linux or launchd on OS X.

Allows you to switch over the postgres schemas in runtime inside ruby/rails

MultiSend makes it easy to send a bunch of messages to an object.

Buffer to handle bulk INSERTs

Multi Session Cache Store

This gem provides a means to support multiple sessions across different tabs in the same browser window.

Run multiple commands in one terminal, side by side

Make a naive rails app multisite easily

Gem for handling multiple SMS API's

Email failover in Rails with MultiSMTP

MultiSMTP Plus provides automatic SMTP failover and rotation across multiple providers for Rails (6–8). It supports sequential or round-robin rotation and per-provider skip conditions (e.g., free-tier quota checks), with optional cross-process state via Redis.

SOLR-Framework wit multi-core supoort and filters

Sort a array of hashes with one or multiple values

Statsd Server with flexible aggregation and back-end support

An ActiveSupport::Store that delegates to a series of stores in order.

Facilitates true multi table inheritance of ActiveRecord models by providing methods for super- and subclasses as well as models with a foreign-key association to MTI records.

Generate new config datanbase and add this connect to current project

A collection of tools for multitenant Ruby/Rails apps

Integrates multi-tenancy into Rail application with MySql db

Rails multitenancy with PostgreSQL schemas.