IntelliJ IDEA

OpenIDEA is a cross-platform desktop IDE with a Rust core and an IntelliJ IDEA–style keymap, tool windows, and search-everywhere workflow. It combines an editor, code insight, debugger, Git integration, terminal, database client, and HTTP client for more than 60 languages, and builds for macOS, Windows, and Linux. The project uses Tauri, is licensed under Apache 2.0, and is not affiliated with JetBrains.

GitHub Copilot is an AI-powered software-development tool created by GitHub, owned by Microsoft, in collaboration with OpenAI. It suggests code completions, whole-line and whole-function snippets, documentation, and software changes for review by an experienced engineer in supported editors and IDEs. Its workflow includes inspecting changes line by line, assessing architectural correctness, and coordinating work with other pull requests. It is offered as a commercial subscription integrated with Visual Studio Code, Visual Studio, JetBrains IDEs, and GitHub Codespaces.

Air is a JetBrains IDE plugin that provides a workspace for agentic software development. It lets users delegate coding tasks to supported agents such as Codex, Claude, Junie, and OpenCode from one place, with parallel sessions and IDE-based diff review tools.

Lithe is a lightweight IntelliJ IDEA alternative for Java and Spring Boot development, designed to support AI-assisted coding workflows. It provides project browsing and editing, symbol navigation, search, Maven management, run configurations, breakpoint debugging, Git side-by-side diffs, local snapshot history, and database workspaces. Language servers, terminals, build tools, debuggers, and database helpers start on demand; the application also provides process-free basic completion and enables richer completion, hover, and semantic navigation through optional language services. It can detect entry points and run Spring Boot, Java, Maven, Gradle, npm, Cargo, Go, Python, Make, Docker Compose, Procfile, and shell projects. The macOS version is the current reference product, while Windows uses an independent React/Tauri implementation; both share command and contract definitions through a Rust core. It supports macOS 13 and later, Windows x64, and Java features require JDK 17 or newer.

Junie Lite is JetBrains’ free AI coding model, included with every JetBrains account and available through JetBrains IDEs and the Junie CLI. It answers coding questions and handles routine development tasks such as renaming functions and scaffolding tests. JetBrains describes it as a free AI layer with no trial or credit card required.