The developer stack, from inline completion to autonomous agents to the APIs and local runtimes you call from your own code.
Flocci AI Tools lists 71 of them, ordered free tiers first: Agno, Aider, AnythingLLM, AWS Strands Agents and Cline. 64 of the 71 are free or have a free tier. Each entry states what it uniquely does rather than a score.
30 on this page are marked fully free with no paid plan at all: Agno, Aider, AnythingLLM, AWS Strands Agents and Cline. The remaining 41 are freemium, trial or paid, and each is labelled with its exact tier so nothing surprises you at sign-up.
They are every catalog entry in 7 sub-categories that map to what developers actually do: write code faster, refactor across a repo, run an agent on a ticket, call a hosted model, run a model offline. There is no sponsorship and no paid placement anywhere in the ordering.
| Tool | Pricing | Type | Listed for |
|---|---|---|---|
| Agno | Free | Agent Frameworks (Developers) | Open-source (Apache-2.0) Python framework, 41.7k GitHub stars |
| Aider | Free | Terminal & CLI Agents | Open-source AI pair programmer in your terminal |
| AnythingLLM | Free | Local LLM Runners | All-in-one local RAG and agents app |
| AWS Strands Agents | Free | Agent Frameworks (Developers) | Open-source (6,800+ stars) Python and TypeScript SDK from AWS |
| Cline | Free | Terminal & CLI Agents | Open-source autonomous coding agent for VS Code |
| Crush | Free | Terminal & CLI Agents | Terminal coding agent from Charm with LSP-aware context |
| DSPy | Free | Agent Frameworks (Developers) | Open-source (MIT) framework from Stanford NLP, 37k+ GitHub stars |
| Gemini CLI | Free | Terminal & CLI Agents | Open-source terminal agent from Google |
| Google Agent Development Kit (ADK) | Free | Agent Frameworks (Developers) | Open-source Python/Java framework from Google for building multi-agent systems |
| Goose | Free | Terminal & CLI Agents | Open-source agent (now under Agentic AI Foundation/Linux Foundation) usable as CLI, desktop app or API |
| GPT4All | Free | Local LLM Runners | Private local chat with your documents |
| Jan | Free | Local LLM Runners | Open-source, offline ChatGPT alternative |
| KoboldCpp | Free | Local LLM Runners | Ships as a single portable executable with a bundled web UI (KoboldAI Lite) |
| LangGraph | Free | Agent Frameworks (Developers) | Build stateful, multi-agent apps as graphs |
| llama.cpp | Free | Local LLM Runners | Pure C/C++ inference engine with minimal dependencies, runs on CPU-only hardware |
| LM Studio | Free | Local LLM Runners | Polished desktop GUI for local models |
| Mastra | Free | Agent Frameworks (Developers) | Open-source TypeScript framework (Apache 2.0) for agents, workflows and RAG |
| Microsoft AutoGen | Free | Agent Frameworks (Developers) | Multi-agent conversation framework |
| MLX-LM (Apple) | Free | Local LLM Runners | Purpose-built for Apple Silicon's unified memory architecture, faster than llama.cpp for many models on Mac |
| Ollama | Free | Local LLM Runners | The default way to run LLMs locally |
| Open WebUI | Free | Local LLM Runners | Self-hosted ChatGPT-style interface |
| OpenAI Agents SDK | Free | Agent Frameworks (Developers) | Lightweight agent orchestration from OpenAI |
| OpenCode | Free | Terminal & CLI Agents | Fully open-source terminal/IDE/desktop coding agent, MIT licensed |
| OpenHands | Free | Autonomous Coding Agents | Self-hosted control center for coding agents with GUI, CLI and SDK surfaces |
| Pydantic AI | Free | Agent Frameworks (Developers) | Type-safe Python agent framework from the Pydantic team, validated structured outputs |
| Qwen Code | Free | Terminal & CLI Agents | Open-source terminal CLI adapted from Gemini CLI, tuned for Qwen3-Coder models |
| SGLang | Free | Local LLM Runners | RadixAttention for automatic prefix-cache reuse across requests |
| smolagents | Free | Agent Frameworks (Developers) | Extremely minimal open-source library (~1,000 lines) from Hugging Face |
| vLLM | Free | Local LLM Runners | PagedAttention memory management for high-throughput multi-request GPU serving |
| Void | Free | AI IDEs & Editors | Fully open-source VS Code fork alternative to Cursor/Windsurf |
| Amazon Q Developer | Freemium | Code Autocomplete & Assistants | AWS-savvy coding assistant and agents |
| Amp | Freemium | Terminal & CLI Agents | Multi-model routing across frontier models with no artificial usage caps |
| Baseten | Freemium | Model Hosting & Inference APIs | Basic plan is pay-as-you-go with free starter credits for new accounts |
| Cerebras Inference | Freemium | Model Hosting & Inference APIs | Runs open models on Cerebras Wafer-Scale Engine hardware at dramatically higher tokens/sec than GPU-based APIs |
| Cloudflare Workers AI | Freemium | Model Hosting & Inference APIs | 10,000 free 'Neurons' of inference per day on every account, resetting daily |
| Codegen | Freemium | Autonomous Coding Agents | Infrastructure layer for deploying, orchestrating and governing many coding agents at scale |
| CrewAI | Freemium | Agent Frameworks (Developers) | Role-based multi-agent 'crews' |
| Cursor | Freemium | AI IDEs & Editors | AI-first VS Code fork with agent mode |
| Fireworks AI | Freemium | Model Hosting & Inference APIs | High-performance open-model serving |
| GitHub Copilot | Freemium | Code Autocomplete & Assistants | The most widely used AI pair programmer |
| GitHub Copilot CLI | Freemium | Terminal & CLI Agents | GitHub-native terminal agent that works directly with issues and PRs |
| Google AI Studio | Freemium | Model Hosting & Inference APIs | Free-tier API access to Gemini Flash-family models with generous token allowances, no credit card required to start |
| Google Antigravity | Freemium | AI IDEs & Editors | Google's agent-first IDE |
| Google Jules | Freemium | Autonomous Coding Agents | Async coding agent that fixes issues & PRs |
| Groq | Freemium | Model Hosting & Inference APIs | Ultra-fast inference on custom LPUs |
| Hugging Face | Freemium | Model Hosting & Inference APIs | The hub for open models and datasets |
| JetBrains Junie | Freemium | AI IDEs & Editors | Autonomous coding agent embedded in JetBrains IDEs (IntelliJ, PyCharm, WebStorm) |
| Kilo Code | Freemium | Terminal & CLI Agents | Same open-source agent usable in VS Code, JetBrains, CLI and cloud from one account |
| Kiro | Freemium | AI IDEs & Editors | AWS's spec-driven agentic IDE |
| LlamaIndex | Freemium | Agent Frameworks (Developers) | Leading framework for RAG and data agents |
| Msty | Freemium | Local LLM Runners | Nexus module: unified gateway for managing model connections, credentials and usage policy across providers |
| Novita AI | Freemium | Model Hosting & Inference APIs | Single API surface for 200+ LLM/image/video/audio models plus on-demand GPU and bare-metal instances |
| OpenAI Codex CLI | Freemium | Terminal & CLI Agents | #1 on Terminal-Bench with GPT-5-series |
| OpenRouter | Freemium | Model Hosting & Inference APIs | One API for 400+ models across providers |
| Qoder | Freemium | AI IDEs & Editors | Multi-agent collaboration IDE from Alibaba |
| Replicate | Freemium | Model Hosting & Inference APIs | Run open models with one API call |
| Sourcegraph Cody | Freemium | Code Autocomplete & Assistants | Deep whole-codebase context |
| Supermaven | Freemium | Code Autocomplete & Assistants | Extremely fast completions |
| Tabnine | Freemium | Code Autocomplete & Assistants | Privacy-first completions (can run air-gapped) |
| Together AI | Freemium | Model Hosting & Inference APIs | Fast, cheap open-model inference |
| Trae | Freemium | AI IDEs & Editors | ByteDance's free AI IDE |
| Warp | Freemium | Terminal & CLI Agents | Terminal rebuilt as an agentic development environment for any coding agent |
| Windsurf | Freemium | AI IDEs & Editors | Agentic IDE with the Cascade flow |
| Zed | Freemium | AI IDEs & Editors | Blazing-fast, Rust-built editor |
| Augment Code | Paid | AI IDEs & Editors | Context Engine built for very large enterprise codebases |
| Claude Code | Paid | Terminal & CLI Agents | Terminal-native agent, best on large codebases |
| DeepInfra | Paid | Model Hosting & Inference APIs | Very low per-token pricing across a large catalog of open models (text, image, audio) |
| Devin | Paid | Autonomous Coding Agents | Most autonomous cloud coding agent |
| Factory | Paid | Autonomous Coding Agents | Enterprise 'Droids' across the whole SDLC |
| Nebius Token Factory | Paid | Model Hosting & Inference APIs | European GPU-cloud-backed inference API hosting major open models (Llama, Qwen, DeepSeek, etc.) |
| SambaNova Cloud | Paid | Model Hosting & Inference APIs | Hosts open models (DeepSeek, MiniMax, Llama) on SambaNova's own RDU chips for high-speed inference |