RubyMine

Website: https://www.jetbrains.com/ruby/

Best for: editing Ruby or Rails applications, which can include Javascript/Typescript

Strengths:

• Code completion
• Easy refactoring
• Powerful navigation tools
• integrated git client
• testing and debugging

Designed specifically for Ruby/Rails, but it also supports other languages and file formats. It’s an integrated development environment that also helps with testing and debugging.