JetBrains RubyMine IDE

RubyMine — is the dedicated Ruby and Rails IDE providing intelligent Ruby code editing assistance and tools for web applications development with Ruby on Rails. Find more at official web-site. IntelliJ IDEA is providing similar functionality with the Ruby Plugin installed.

RubyMine 5.4.3 is available (released July, 1 2013

, updated *March 4, 2013{*}
Read what's new in RubyMine 5.4, download and try it.

{*}RubyMine 5.4 EAP is available* (updated *April 8, 2013*)
Visit [RubyMine 5.4 EAP page|RUBYDEV:RubyMine EAP] to download and try it.

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Ruby plugin for IntelliJ IDEA is updated according to RubyMine's Development Roadmap.
Plugin is available in the Plugin Repository.
Older plugin versions
Choosing between IntelliJ IDEA with Ruby plugin and RubyMine? Find out the differences.