Free Developer Tools

Skillbay is a curated marketplace of AI agent skills (SKILL.md packages) that publishers and developers can browse, install, buy, or sell. Each skill includes human review and before-and-after examples, and the site exposes a JSON API and MCP server for integration.

Moadim is an open-source loop engine that schedules and runs AI agents (Claude, Codex, Hermes, NanoClaw, Pi) against a repository or task on a recurring schedule in isolated workbenches with watchdogs and built-in HTTP/MCP interfaces.

Knowl is a local-first, open-source persistent memory system for AI coding agents that records provenance, evidence, reasoning and supersession for every fact so agent answers stay current and auditable.

Forth MCP is a hosted relay that exposes local, NAT'd, or firewalled MCP servers behind a single secure URL so any MCP-speaking AI client (e.g., Claude, ChatGPT) can call your local tools without port forwarding or VPN.

Spore is a distributed AI platform that lets you run open-weight models on your own macOS, Windows, or Linux hardware, access them remotely via end-to-end encrypted connections, earn credits by serving requests, and tap a distributed network for larger models with an OpenAI-compatible API.

LLM Status is a model-lifecycle tracker and CLI that scans code repositories for AI model IDs, flags models that are deprecated or retiring, and offers automated fixes, CI checks, and cloud alerts to keep projects off retirement schedules.

Thyme is a native desktop reverse-engineering IDE for Android apps and native binaries. It decompiles Java and analyzes ARM code locally, with optional licensed analysis features including a SQL-queryable workspace and native library analysis.

Viaduct is a C4 architecture modelling tool by Quiet Grid Labs that keeps a single, editable model across four C4 levels, attaches docs/diagrams/OpenAPI contracts to elements, and serves the architecture to AI coding agents via a hosted MCP server.

Lific is a self-hosted, single-binary issue tracker and planning tool designed for coding agents and human teams — it exposes a web UI, CLI, REST API and MCP tool surface so agents and developers can track plans, issues, comments, and audits on your own server.

Revdoku is a web platform that turns HTML, folders, prototypes and other files into live, shareable websites and mini-apps with built-in backend features (forms, notifications, analytics) and direct integration with AI tools for creating and updating sites.

PulpMiner turns any public webpage into a realtime JSON API using AI-powered extraction, enabling instant structured data access with zero maintenance and no-code setup.

Skrape converts websites into structured JSON or semantic Markdown via an API and crawling platform aimed at developers building AI agents, RAG pipelines, and data products. The service provides headless-browser rendering, intelligent crawling, real-time extraction, and type-safe schema validation.

Volamail is an open-source, self-hostable email platform that provides AI-assisted email template editing and transactional email delivery via simple HTTP API calls, with hosted plans and a free tier for small projects.

SingleAPI is a GPT-4 powered web scraping and data-extraction API that converts any website into a structured API (JSON, CSV, XML, Excel) in seconds, with built-in data enrichment, proxy rotation, monitoring, and webhook delivery.

Discuro is an all-in-one platform for developers to build, test, and execute complex AI workflows via an easy-to-use UI and a single API call, with integrations for OpenAI models like GPT-3 and DALL·E-2.

EnergeticAI is an open-source, TensorFlow.js-based library optimized for Node.js and serverless environments that provides pre-trained models (embeddings, classifiers) with fast cold-starts, small module sizes, and business-friendly licensing.

WaterCrawl is a modern web crawling framework that extracts and structures website content for downstream use, including AI-ready data transformation, sitemap generation, JavaScript rendering, and API/SDK integration for teams and developers.

PoseTracker is a developer-focused pose estimation and motion-tracking product that provides real-time on-device MoveNet keypoints for iOS, Android, React Native and web, plus an optional API for reps, angles and form scoring.

Gemma4All Hardware Checker is part of Gemma4All, a collection of interactive tools and step-by-step guides to run Google's Gemma 4 models locally on Macs, GPUs, and PCs — offering a device compatibility checker, command generator, and model picker to help users pick and run the right Gemma 4 variant without cloud infrastructure.

DDS Hub is a developer-first API relay that provides low-latency, privacy-focused access to Anthropic Claude models and Codex GPT series, offering enterprise static IPs, streaming support, and local payment methods (Alipay/WeChat Pay).

Denvr AI Cloud is a Canadian-founded private AI platform offering sovereign cloud and on-prem AI infrastructure: GPU compute, managed inference, and NVMe data systems with developer tooling and APIs for teams requiring data residency and production-grade AI operations.

local.ai is a free, open-source native app for managing, verifying, and running AI models locally (offline) with CPU inferencing; it emphasizes privacy, low memory footprint (Rust backend), and simple model/server workflows.

Theneo is an all-in-one developer portal for API references, guides, changelogs, and private customer portals that combines real-time collaboration and integrated AI features (Ask AI, MCP, llms.txt) to keep docs synchronized between engineers, writers, PMs, and AI agents.

AI2SQL is an AI-powered SQL assistant that generates, explains, optimizes, fixes, formats and runs SQL against your live database schema, with read-only, audited connections and multi-database support.