kaminari-actionview provides pagination helpers for your Action View templates

Easy upload management for ActiveRecord

Net::SSH: a pure-Ruby implementation of the SSH2 client protocol. It allows you to write programs that invoke and interact with processes on remote servers, via SSH2.

A modern, highly customizable, and responsive Jekyll theme for documentation with built-in search.

A secure, non-evaling end user template engine with aesthetic markup.

The OS gem allows for some useful and easy functions, like OS.windows? (=> true or false) OS.bits ( => 32 or 64) etc"

A generalized Rack framework for multiple-provider authentication.

This gem is used by GitHub to render any fancy markup such as Markdown, Textile, Org-Mode, etc. Fork it and add your own!

Simple mime type detection using magic numbers, filenames, and extensions

Fluentd is an open source data collector designed to scale and simplify log management. It can collect, process and ship many kinds of data in near real-time.

Manipulate images with minimal use of memory via ImageMagick

Simple, feature rich ascii table generation library

memoize methods invocation

A plain-Ruby implementation of GraphQL.

Wrap an option at compile-time and `call` it at runtime, which allows to have the common `-> ()`, `:method` or `Callable` pattern used for most options.

Daemons provides an easy way to wrap existing ruby scripts (for example a self-written server) to be run as a daemon and to be controlled by simple start/stop/restart commands. You can also call blocks as daemons and control them from the parent or just daemonize the current process. Besides this basic functionality, daemons offers many advanced features like exception backtracing and logging (in case your ruby script crashes) and monitoring and automatic restarting of your processes if they crash.

Renders and parses JSON/XML/YAML documents from and to Ruby objects. Includes plain properties, collections, nesting, coercion and more.

RequestStore gives you per-request global storage.

Uglifier minifies JavaScript files by wrapping UglifyJS to be accessible in Ruby

A high-level IO library that provides validation, type conversion, and more for command-line interfaces. HighLine also includes a complete menu system that can crank out anything from simple list selection to complete shells with just minutes of work.