Alternatives to Choco Builder

Google's open-source framework for building agentic AI apps in JS, Go, Python & Dart.

Open-source MCP testing & app framework for building ChatGPT Apps and Claude Connectors.

An open-source Python framework that turns ordinary functions into AI-powered tools via simple decorators.

Vercel AI SDK is an open-source TypeScript toolkit for building AI apps with 100+ models, real-time streaming, fallbacks, and agents

Open-source spec framework that keeps AI coding agents aligned with your requirements as work evolves.

Open-source Python framework turning messy text into typed, queryable Semantic DataFrames

Open Harness is an open-source TypeScript SDK for building Claude Code-style agent harnesses with stateless primitives and composable middleware.

Open-source Python & TypeScript SDK for building production-grade AI agents with hooks, model routing, and cost controls.

EffGen is a Python framework for building AI agents on small language models, run locally or through any OpenAI-compatible server.

Open-source Java library for building LLM-powered apps with a unified API

Open-source dev platform uniting AI, NoCode, Code, and reusable MicroApps.

Pioneering open-source AI coding agent for VS Code and JetBrains, now archived after Cursor acquisition.

Open-source autonomous AI coding agent that plans, executes, and deploys tasks inside VS Code and JetBrains IDEs.

Crush is a free, open-source agentic coding assistant that runs in your terminal and wires any LLM into your CLI workflow.

Guidance is an open-source Python library for constrained LLM generation with regex, CFG, and native control flow.

Open-source coding agent that edits code and runs terminal commands across IDE, CLI, and desktop.

Open-source, local-first AI design workspace that wires your coding agent into a design engine

Open-source AI agent skills for CAD, CAE, and CAM from text or images.

Free, open-source macOS terminal + live diff cockpit for vibe coding with agent orchestration

Free, open-source AI code assistant for JetBrains IDEs with spec-driven development

Open-source ruleset that makes AI coding agents write minimal, pragmatic code.

Open-source AI coding agent with 500+ models, zero markup, across IDE, CLI, and cloud.

Open-source AI tool that converts screenshots, mockups, and screen recordings into clean HTML, React, and Vue code.

Open-source desktop workspace to run and route multiple AI coding agents locally.

Open-source LLM that turns natural language into API calls for tool-using agents

Open-source AI coding agent for terminal, IDE, and desktop with model-agnostic provider support.

MiMo-Code is Xiaomi's free open-source AI coding assistant with unlimited context and a 256k-token MiMo-V2-Flash model.

Free open-source VSCode extension for one-click AI code comments, conversions, and UI-to-code

Go-native LLM framework by ByteDance for building production-grade AI applications.

Open-source streaming-first toolkit that turns AI agent output into interactive UI, not JSON.