RubyGems is a package manager for the Ruby programming language that provides a standard format for distributing Ruby programs and libraries (in a self-contained format called a "gem"), a tool designed to easily manage the installation of gems, and a server for distributing them.

It was created by Chad Fowler, Jim Weirich, David Alan Black, Paul Brannan and Richard Kilmer in 2004.

[3] RubyGems integrates with Ruby run-time loader to help find and load installed gems from standardized library folders.

[5] It was created by Chad Fowler, Jim Weirich, David Alan Black, Paul Brannan and Richard Kilmer during RubyConf 2004.

Gems work only on ruby designed for a particular platform based on CPU architecture and operating-system type and version.