IDE

CodeGPT.nvim

Neovim plugin that wraps ChatGPT in a floating-window chat interface for code completion, refactoring, documentation, debugging prompts, and test generation. Requires your own OpenAI API key. Last updated roughly two years ago and no longer actively maintained.

Windsurf

Agentic AI-native IDE (built on VS Code) from Cognition AI, powered by the Cascade agent for codebase-wide reasoning, multi-file edits, and autonomous terminal actions.

GitHub Copilot

GitHub's AI pair programmer: context-aware code completions, chat, code review, and an autonomous coding agent built into VS Code, JetBrains, Visual Studio, and more.

Kilo Code

Open-source agentic coding platform: a VS Code/JetBrains extension and CLI harness with five agent modes, 500+ model support at zero markup (BYOK), an MCP marketplace, and parallel subagent execution.

Cody (Sourcegraph)

Sourcegraph's enterprise AI coding assistant, built on Code Graph for deep multi-repo context: code search, chat, and autocomplete tuned for large, complex codebases. Shifted to enterprise-only pricing in 2025.

Blackbox AI

Multi-agent coding assistant with a VS Code extension used across 35+ IDEs. Runs tasks in parallel across several AI models and picks the best result, with image-to-code conversion and an autonomous CyberCoder agent.

JetBrains AI

JetBrains' built-in AI assistant: inline completion, chat, and the Junie autonomous agent, sharing one subscription and credit pool across IntelliJ-based IDEs. Junie plans, writes, tests, and self-corrects multi-file changes.

Tabnine

Privacy-focused AI code assistant with code completion, IDE chat, and agentic workflows. Supports SaaS, VPC, on-premises, and air-gapped deployment with zero code retention. Dropped its free plan in 2024.

Amazon Q Developer

AWS's AI coding assistant and successor to CodeWhisperer. Provides autonomous agents, security scanning, and code transformation, with console error diagnostics and AWS resource guidance built in.

Replit Ghostwriter

AI pair programmer built into the Replit cloud IDE, with inline completion, code explanation, natural-language refactors, and a chat assistant tuned for over 50 programming languages.

Google Code Assist (Gemini)

Google's AI coding assistant for VS Code, JetBrains, and Android Studio. Offers chat, completions, and agent mode with MCP support, grounded in BigQuery and Firebase. Dropped its free individual tier in June 2026 in favor of Antigravity.

Roo Code

VS Code extension that forked Cline to add customizable agent modes for different kinds of work, including a mode aimed at sysadmins using natural language in a CLI. Shut down on May 15, 2026, with its GitHub repository now archived.

Zed

Code editor built from scratch in Rust with GPU-accelerated rendering for sub-millisecond input latency. AI is native rather than bolted on as an extension, with an agentic editing mode that can plan and apply multi-file changes using Claude, GPT, or local models, plus real-time collaboration built into the protocol itself. Free personal plan forever; Pro is $10/month.

Augment Code

Cloud AI coding platform for engineering teams, built around a Context Engine that indexes a whole codebase's call relationships and cross-service dependencies. Runs up to 10 autonomous Remote Agents in parallel, each in its own sandboxed VM, alongside IDE agents for VS Code and JetBrains. Indie plan is $20/month; Max is $200/month per developer.

ReSharper

JetBrains' .NET productivity extension for Visual Studio, now adding Junie, an LLM-agnostic AI agent via the Agent Client Protocol that can refactor code, run terminal commands, manage git, and explain legacy code directly inside Visual Studio.

Cline

Open-source VS Code extension that turns the editor into a coding agent using your own API key for Claude, GPT, Gemini, or a local model. Reads and writes files, runs terminal commands, and browses the web for research inside a Plan/Act workflow, with an approval gate before each action. Over 5 million installs and 58,000+ GitHub stars.

Warp

Rust-based, GPU-accelerated terminal with an Agent Mode that turns plain-language requests into shell commands and multi-step tasks, plus Oz, a cloud orchestrator for background agents. The terminal is free; AI usage runs on a credit system.

org-ai (Emacs)

Emacs minor mode that turns org-mode into an AI assistant, calling ChatGPT or LLaMA for text generation and DALL-E or Stable Diffusion for images, with speech input and output support.

Genie AI – ChatGPT for VS Code

AI pair programmer extension for VS Code, with custom system messages and support for GPT-4o and the o1 model family. Around 1,300 GitHub stars, still actively maintained with regular bug fixes.

Blinky Debugging Agent

Open-source AI debugging agent for VS Code, inspired by SWE-agent. Uses the VS Code API, Language Server Protocol, and print-statement debugging to track down and fix real backend bugs.

Dyad

Free, local, open-source AI app builder, an alternative to Lovable, v0, Bolt, and Replit. Generates standard Next.js code on your disk using your own API keys (Anthropic, OpenAI, Google) or fully offline via Ollama or LM Studio. Over 1 million downloads and roughly 21,000 GitHub stars; core is Apache 2.0, with a fair-source Pro tier.

Void

Open-source, MIT-licensed code editor forked from VS Code, built as a transparent alternative to Cursor or Copilot. Supports inline editing, agentic task execution, autocomplete, and chat with local models via Ollama or APIs like OpenAI and Claude, with one-click import of existing VS Code extensions and themes.

Cursor

AI-first code editor (a VS Code fork) with Tab autocomplete, multi-file Agent mode, Composer, background agents, and native MCP support, running on frontier models like Claude, GPT, and Gemini.

Antigravity

Google's agent-first development platform, built around Gemini 3. Antigravity 2.0 (announced at I/O 2026) adds a standalone desktop app, CLI, and SDK, parallel sub-agents that write components, configure routes, and run tests at the same time, and browser-in-the-loop testing where agents visually verify the UI they built. Free tier, with Pro at $20/month.

Claude Code

Anthropic's agentic coding tool, running in the terminal, IDE, desktop app, and browser. Reads your codebase, edits files, runs commands, and connects to your development tools. Bundled into every paid Claude plan starting at $20/month.

Bolt.new

StackBlitz's in-browser AI app builder. Generates and runs full-stack web and mobile apps from natural-language prompts using Claude, with instant live preview via WebContainers running entirely in the browser.

Trae AI

ByteDance's free AI-native code editor, a VS Code fork with chat, multi-file Agent mode, and a SOLO mode that drives larger tasks end to end. Includes MCP support and free access to Claude and GPT models.

Refact.ai

Open-source AI coding agent that plans, executes, and iterates on engineering tasks end to end. Uses RAG for repository-aware completions, integrates with GitHub, databases, and CI/CD, and supports self-hosting with any major LLM.

Continue

Open-source AI coding assistant for VS Code and JetBrains. Routes between Anthropic, OpenAI, Ollama, and other model providers through a single config file, with custom context providers, slash commands, and an Agent mode for multi-step tasks.