Developer Resources
Only resources directly related to AI, APIs, development and infrastructure are listed. Each entry includes an official entry point, a free-usage summary, related platforms and a quality score; this is not a dumping ground for generic AI tools.
A collection of entry points built around verifiable free tiers, starting credits and low-friction APIs.
The directory is free to browse; each item's conditions must be checked against the official source.
View resource βThe official directory for open models, model cards, licenses and inference entry points.
The model directory is free to browse; whether inference is free depends on the provider and account.
View resource βNew-user credits, trial balances and promotional vouchers compiled from official sources.
The page is free; credit status must be confirmed on the provider's official page.
View resource βUnifies multiple LLM providers behind an OpenAI-compatible interface, suited to gateways, routing and cost observability.
Open-source project, self-hostable; cloud service plans must be checked separately.
View resource βA development framework for orchestrating models, tools, retrieval and agent workflows.
The core code is open source; third-party model/API costs are not included in the project.
View resource βAn LLM application framework for RAG, data connectors and agents.
The open-source core is self-hostable; model, vector store and managed service costs are billed separately.
View resource βA high-throughput open-source framework for LLM inference and OpenAI-compatible serving.
Open source under Apache-2.0; the GPU/cloud resources required to run it may incur costs.
View resource βA developer tool for running open models locally with a simple API.
The software is open source and free to run locally; hardware, power and model storage costs are the user's responsibility.
View resource βAn open protocol connecting models with external tools, data sources and workflows.
The specification and SDKs are public; service costs and permissions of individual servers must be checked separately.
View resource βA local evaluation tool for prompts, model outputs and security policies.
The open-source CLI runs locally; enterprise features and external model costs are billed separately.
View resource βAn observability platform for tracing, cost, latency and quality in LLM applications.
The open-source version is self-hostable; the official cloud free tier and quotas must be checked against the current plan.
View resource βAn LLM API observability and cost analysis tool with proxy-based integration.
The core project is open source; the cloud free tier and quotas are subject to the official plan page.
View resource βAn open observability standard for cross-language traces, metrics and logs.
The specification, SDKs and Collector are open source; backend storage costs are billed separately.
View resource βAn open-source tool for LLM tracing, evaluation and retrieval quality observability.
Open source and self-hostable; the hosted version's plans must be checked separately.
View resource βA developer tool for tracing, evaluating and versioning LLM applications.
A public developer entry point is available; free tier limits are subject to the official plan page.
View resource βAn open-source platform for machine learning and generative AI lifecycle management.
Open source and self-hostable; hosting and storage costs are billed separately.
View resource βAn open-source embedding database and retrieval component for AI applications.
The open-source local mode is free; the cloud free tier is subject to the official plan page.
View resource βAn open-source vector search engine offering filtering, similarity search and a cloud service.
Open source and free to self-host; the Qdrant Cloud free tier is subject to the official plan page.
View resource βAn open-source vector database supporting hybrid search and modular AI integrations.
Open source and free to self-host; the cloud free tier and resource limits must be checked against the official plan.
View resource βAn open-source database and cloud service for large-scale vector search.
The open-source components are self-hostable; Zilliz Cloud plans must be checked separately.
View resource βA managed vector database for RAG and semantic search applications.
An official Starter/free entry point is available; specific storage and read/write limits are subject to the current plan page.
View resource βLaunches cloud functions, GPU jobs and model inference services from Python workflows.
An official developer trial/free credit entry point is available; quotas must be checked against the current plan.
View resource βA developer cloud platform for model inference, training and GPU pods.
Public documentation and a pay-as-you-go entry point; free credits must be confirmed against promotion/account terms.
View resource βPublish model demos and developer apps with Gradio, Streamlit and similar tools.
A free hardware tier exists; sleeping, resource and public-visibility limits are subject to the official documentation.
View resource βA searchable, versioned and shareable dataset directory suited to model experiments and baseline reproduction.
Public browsing and download entry points; each dataset's license must be checked individually.
View resource βA public web crawl corpus and index suited to retrieval, data engineering and research use.
The data is publicly downloadable; dataset terms, robots and downstream license requirements must be observed.
View resource βA CI/CD platform for automating tests, data updates and static deployments.
Public repositories usually include a free Actions quota; minutes and organization plans are subject to official policy.
View resource βAn edge deployment platform suited to static sites and frontend build output.
An official Pages free plan is available; build, request and feature limits are subject to the current plan page.
View resource βError tracking, performance monitoring and release health analysis.
An official developer free plan is available; event volume and retention are subject to the current plan page.
View resource βA product analytics, event capture and experimentation platform suited to observing developer product behavior.
An official free event quota is available; specific product modules and quotas are subject to the current plan page.
View resource βA developer platform for running and deploying community models via API.
Models can be discovered and tried; pricing, trials and model run costs must be checked against the current page.
View resource βA platform offering open-model inference, fine-tuning and high-performance deployment APIs.
Public documentation allows evaluating the APIs; free credits must be confirmed against the current account and pricing page.
View resource βOffers the Sonar API with search and citation capabilities, suited to applications that need real-time information.
Official documentation and pricing are public; free credits must be confirmed against current account policy.
View resource βThe official ecosystem entry point for MCP servers, tool connections and local development integrations.
The ecosystem directory is public; each server's permissions, data handling and costs must be reviewed individually.
View resource βA self-hostable model chat interface supporting Ollama and OpenAI-compatible APIs.
Open source and self-hostable; external model API and server resource costs are billed separately.
View resource β