Show HN: Builder Lab – Best AI and open-source tools for builders in one place

OpenRouter Unified API gateway for many frontier and open models with routing and pricing controls. Freemium Docs AI, LLM, router Indie favorite Hugging Face Inference API Hosted inference for thousands of models across NLP, vision, and audio. Freemium Docs AI, Open Source, inference Largest community Replicate Run open-source models in the cloud with simple APIs and deployments. Paid Docs models, images, video Creator ecosystem Ollama Run and manage LLMs locally with one-line model pulls. Free Docs local, privacy, LLM Local dev Mistral API High-performance open-weight and commercial LLMs with competitive pricing. Freemium Docs LLM, text-generation EU favorite Gemini API Google's multimodal models for text, image, and tooling. Freemium Docs multimodal, text, vision Google scale Together AI Inference and fine-tuning platform for open models with competitive throughput. Paid Docs LLM, inference, finetune Production ready Groq API Ultra-low-latency LPU inference for Llama and Mixtral models. Freemium Docs latency, LLM Blazing fast LM Studio (local) Desktop app to run, compare, and serve local LLMs. Free Docs local, desktop User friendly GPT4All (local) Open-source local LLM ecosystem with desktop apps and SDKs. Open Source Docs local, open source Privacy focused KoboldCpp Fast CPU/GPU backend for running LLMs locally with UI integrations. Open Source Docs local, cpp, open source Active OSS Text Generation Web UI Popular web UI for running and chatting with local text-generation models. Open Source Docs local, UI, open source Large community Perplexity API Answer engine API combining retrieval with strong model responses. Paid Docs RAG, search Emerging API Google Colab Hosted Jupyter notebooks with free GPUs for ML. Free Docs notebooks, gpu, ml Widely used Claude AI assistant for chat and reasoning, hosted by Anthropic. Freemium Docs AI, assistant, chat Widely used ChatGPT Conversational AI by OpenAI, useful for general-purpose chat, QA, and integration. Freemium Docs AI, chat, LLM Mainstream AutoGPT Open-source autonomous agent framework that orchestrates LLMs to perform multi-step tasks. Open Source Docs agent, LLM, automation Well-known in agent community AutoGen (Microsoft) Multi-agent orchestration framework from Microsoft for building LLM-powered workflows and applications. Open Source Docs agent, orchestration, LLM Emerging enterprise interest LangChain Framework for building applications with LLMs by chaining prompts, agents, and memory together. Open Source Docs framework, LLM, agents Very high LlamaIndex (formerly GPT-Index) Indexing and data-connector library to connect LLMs to external data sources for retrieval-augmented generation. Open Source Docs RAG, indexing, LLM High among RAG builders VLLM High-performance LLM inference engine for faster CPU/GPU batched inference. Open Source Docs inference, LLM, performance Popular for inference optimization GooseAI Managed service and model host providing access to various foundation models and inference endpoints. Freemium Docs inference, models, host Niche / growing Langflow Visual builder for LLM chains and flows — drag-and-drop interface for LangChain-compatible components. Open Source Docs visual, workflow, LLM Indie favorite Letta Conversational AI framework designed to build chat experiences and conversational agents. Open Source Docs conversational, AI, framework Emerging Apidog API testing platform (with AI-assisted features) for designing, testing, and documenting APIs. Freemium Docs API, testing, automation Indie dev favorite Qodo AI assistant focused on code completion, refactorings and code understanding (developer-facing). Freemium Docs AI, code, assistant Emerging DeepSeek AI-powered semantic search and reasoning product that enables building powerful search experiences. Freemium Docs semantic search, AI, retrieval Niche Google Gemini Google’s family of large multimodal models and APIs for chat, images, and coding assistance. Freemium Docs multimodal, Google, LLM Mainstream NotebookLM Google’s research assistant that helps you ask questions and get answers from documents and notes. Freemium Docs research, notebook, LLM Google product audience