Zazen (Freebuff fork)
Zazen (Freebuff fork) is a free AI coding agent tool installed globally via npm.
AI Coding Agents
Browse popular AI coding agents, coding assistants, and developer tools across terminal workflows, repo-wide edits, code review, and autonomous software tasks.
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Quickly compare positioning, website creation date, OpenRouter token rank, and monthly audience across agents in this category (source: Similarweb).
| Product | Summary | Third-party key | Created at | OpenRouter token rank | Monthly users |
|---|---|---|---|---|---|
1 Zazen (Freebuff fork) | Zazen (Freebuff fork) is a free AI coding agent tool installed globally via npm. | Supported | 2000-03-20 | #2 | 315,677 |
2 Claude Code | Claude Code is Anthropic's AI coding interface, with the core selling point being a continuously optimized development system achieved through CLAUDE.md project memory files and a multi-agent architecture. | Supported | 2018-08-04 | #3 | 107.5M |
3 Cline | Cline is an open-source AI coding assistant that supports bring-your-own API keys for access to multiple models, enabling autonomous analysis and execution across an entire codebase in VS Code. | Supported | 2024-09-30 | #4 | — |
4 Kilo Code | Kilo Code is an MIT-licensed open-source AI coding agent that can be installed in VS Code, JetBrains, and the terminal, supporting connections to more than 500 models with no extra fees. | Supported | 2025-03-05 | #5 | 1,519 |
5 pi | Pi is an open-source terminal coding agent framework that provides a minimal core, allowing users to build custom AI coding agents through extensions. | Supported | 2024-01-30 | #6 | 695,020 |
6 omp | omp is an open-source terminal coding agent that supports over 60 model providers and allows switching models within a session. | Supported | 2026-05-11 | #7 | 187,532 |
7 Codex | Codex is a code generation model released by OpenAI, with the core selling point of turning natural language descriptions directly into runnable code. | Supported | 2007-01-19 | #11 | 84.64M |
8 ![]() DeepSeek Harness | DeepSeek Harness is a GitHub repository maintained by deepseek-ai that provides ready-made evaluation scripts and task configurations for DeepSeek models based on lm-evaluation-harness. | Supported | — | #8 | — |
9 OpenHands | OpenHands is an open-source AI software development agent platform where users can run agents through the CLI, GUI, or SDK to handle code changes and engineering tasks. | Supported | — | #15 | 163,943 |
10 ZCode | ZCode is a desktop AI coding IDE with the built-in GLM-5.2 model and 3 million free tokens per day. | Supported | 2017-12-15 | #19 | 955,844 |
11 Cursor | Cursor is a VS Code-based code editor whose core selling point is built-in AI chat and multi-file editing. | Supported | 1995-12-20 | #20 | 7.761M |
12 Zed Editor | Zed Editor is an open-source code editor written in Rust, with its core selling points being extremely fast startup and editing speed, plus built-in real-time collaboration and AI tools. | Supported | 2020-09-03 | #23 | 646,993 |
13 ![]() Zoo Code | Zoo Code is an open-source code editor extension that runs multiple AI agents to form a development team inside the editor. | Supported | — | #27 | — |
14 Command Code | Command Code is an AI coding agent optimized for open-source models, providing tool call repair and /design skills. | Supported | — | #38 | 235,826 |
15 ![]() Roo Code | Roo Code is a VS Code extension-form AI coding agent that supports executing code locally via Claude models and integrates browser login. | Supported | 2025-01-17 | #46 | 11,821 |
16 ![]() Qwen Code | Qwen Code is QwenLM's code project repository on GitHub, providing developers with a direct entry point to access and run Qwen-related code models. | Supported | — | #45 | — |
17 goose | Goose is an open-source local AI coding agent that supports executing code operations on the user's computer through any LLM model. | Supported | 2026-03-30 | #48 | 167,941 |
18 mimocode | Xiaomi's open-source terminal AI coding agent, supporting cross-session persistent memory and long-task handling by saving state through files. | Supported | 2003-07-22 | #54 | 5.146M |
19 CodeGPT | CodeGPT is a programming assistant platform that supports integrating multiple AI models in JetBrains IDEs and similar tools. | Supported | — | #43 | 97,848 |
20 Strate Systems / Codex CLI | Codex CLI is an open-source coding agent tool that runs locally. | Unknown | 2025-11-23 | — | — |
21 ![]() grok-openrouter-ox | grok-openrouter-ox is a developer project for accessing models such as Grok and Ox Alpha through OpenRouter. | Unknown | — | — | — |
22 Crush | Crush is a terminal agentic coding tool from Charmbracelet that supports switching between different LLM models in the same session while retaining context. | Supported | 2023-08-17 | #60 | 39,283 |
23 ![]() jcode | jcode is a terminal coding agent tool written in Rust, with its core selling point being extremely low memory usage and support for running dozens of parallel sessions at the same time. | Unknown | — | #51 | — |
24 Codebuff | Codebuff is a terminal AI coding agent that is free to use by showing text ads, with its core selling point being that it splits coding tasks across multiple specialized sub-agents such as file selection, editing, and review. | Unknown | 2009-11-03 | — | 39,246 |
Zazen (Freebuff fork) is a free AI coding agent tool installed globally via npm.
Claude Code is Anthropic's AI coding interface, with the core selling point being a continuously optimized development system achieved through CLAUDE.md project memory files and a multi-agent architecture.
Cline is an open-source AI coding assistant that supports bring-your-own API keys for access to multiple models, enabling autonomous analysis and execution across an entire codebase in VS Code.
Kilo Code is an MIT-licensed open-source AI coding agent that can be installed in VS Code, JetBrains, and the terminal, supporting connections to more than 500 models with no extra fees.
Pi is an open-source terminal coding agent framework that provides a minimal core, allowing users to build custom AI coding agents through extensions.
omp is an open-source terminal coding agent that supports over 60 model providers and allows switching models within a session.
Codex is a code generation model released by OpenAI, with the core selling point of turning natural language descriptions directly into runnable code.

DeepSeek Harness is a GitHub repository maintained by deepseek-ai that provides ready-made evaluation scripts and task configurations for DeepSeek models based on lm-evaluation-harness.
OpenHands is an open-source AI software development agent platform where users can run agents through the CLI, GUI, or SDK to handle code changes and engineering tasks.
ZCode is a desktop AI coding IDE with the built-in GLM-5.2 model and 3 million free tokens per day.
Cursor is a VS Code-based code editor whose core selling point is built-in AI chat and multi-file editing.
Zed Editor is an open-source code editor written in Rust, with its core selling points being extremely fast startup and editing speed, plus built-in real-time collaboration and AI tools.

Zoo Code is an open-source code editor extension that runs multiple AI agents to form a development team inside the editor.
Command Code is an AI coding agent optimized for open-source models, providing tool call repair and /design skills.

Roo Code is a VS Code extension-form AI coding agent that supports executing code locally via Claude models and integrates browser login.

Qwen Code is QwenLM's code project repository on GitHub, providing developers with a direct entry point to access and run Qwen-related code models.
Goose is an open-source local AI coding agent that supports executing code operations on the user's computer through any LLM model.
Xiaomi's open-source terminal AI coding agent, supporting cross-session persistent memory and long-task handling by saving state through files.
CodeGPT is a programming assistant platform that supports integrating multiple AI models in JetBrains IDEs and similar tools.
Codex CLI is an open-source coding agent tool that runs locally.

grok-openrouter-ox is a developer project for accessing models such as Grok and Ox Alpha through OpenRouter.
Crush is a terminal agentic coding tool from Charmbracelet that supports switching between different LLM models in the same session while retaining context.

jcode is a terminal coding agent tool written in Rust, with its core selling point being extremely low memory usage and support for running dozens of parallel sessions at the same time.
Codebuff is a terminal AI coding agent that is free to use by showing text ads, with its core selling point being that it splits coding tasks across multiple specialized sub-agents such as file selection, editing, and review.
This category fits users looking for terminal agents, IDE coding assistants, repo-wide automation, code review, and multi-step software tasks. Search intent usually blends agent, assistant, and tool language together.
The most important dimensions are terminal control, IDE integration, third-party key support, model choice, and large-codebase workflow depth. For developers, real execution matters more than generic chat quality.
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