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.

The industry's leading Python IDE, now unified into a single product. The late 2025 version features native MCP (Model Context Protocol) support for connecting AI agents like Claude or Cursor directly to the IDE's internal index. It includes world-class support for Django, Flask, and FastAPI, alongside a powerful Data Science suite. While it is more resource-heavy than VS Code, its built-in Jupyter Notebook support is now free for all users in the unified edition.