The definitive IDE for JVM development, now featuring a 'Unified Distribution' where professional tools are unlocked via subscription. Known for its unparalleled static analysis and the new 'Junie' AI agent, it remains the gold standard for complex enterprise Java/Kotlin, though its heavy resource footprint and high cost drive hobbyists toward AI-first editors.

The industry's most powerful IDE for Ruby and Ruby on Rails. Since the late 2025 update (v2025.3), it is free for non-commercial use and features a Rails-aware MCP (Model Context Protocol) server for smarter AI assistance. It offers deep refactoring, integrated testing (RSpec, MiniTest), and a GUI-based debugger. While it has a higher RAM footprint than text editors, its new 'Islands' UI and faster multi-module startup make it the most productive environment for complex Rails apps.