Directory

API-first US brokerage offering a Trading API, Market Data API and Broker API for stocks, ETFs, options and crypto, with paper trading

REST API for stock, ETF, options, forex, crypto, commodity and economic data plus fundamentals, news sentiment and technical indicators, with a free key tier and premium plans

Markdown note-taking app for Mac, iPhone and iPad from Shiny Frog with nested tags, note links and iCloud sync, free with a Pro subscription

Open-source password manager with hosted and self-hosted server options, passkey support, organization sharing and a separate Secrets Manager for developers

Bloomberg's subscription workstation for market data, news, analytics, messaging and execution, with Excel integration and the BLPAPI library for C++, Java, .NET and Python

PDF markup, measurement and collaboration software for construction documents, with a Windows desktop app plus web and mobile companions

Hosted observability and evaluation platform for AI agents with tracing, experiments, pattern detection, a CLI, MCP access and an AI assistant (Loop) that analyzes traces and builds evals

Web data platform combining residential, datacenter and ISP proxy networks with unblocking, SERP and scraper APIs, remote browsers, ready-made datasets and an MCP server

Webrecorder's browser-based web archiving system, available hosted or self-hosted, that crawls sites with real browsers into signed WACZ files replayable with ReplayWeb.page

OpenAI's consumer and workplace assistant, available on the web, desktop and mobile, with projects, plugins, browsing, voice and the Codex coding agent

Anthropic's consumer and team assistant on web, desktop and mobile, with projects, artifacts, memory, connectors and web search, sold on Pro, Max, Team and Enterprise plans

Global network offering authoritative DNS, CDN and reverse-proxy security, a domain registrar, Zero Trust access and the Workers serverless platform

Visual literature-exploration tool that builds a similarity graph of papers around a seed paper, with prior and derivative works lists

AI search engine over peer-reviewed literature that synthesizes answers, shows a Consensus Meter for yes/no questions and summarizes studies

Block-based document and notes app with native Apple, Windows and web clients, structured pages, collections and shareable published documents

Membership organization that registers DOIs for scholarly content and exposes the metadata through a free public REST API, content negotiation and the paid Metadata Plus service

Open-source behavior-based intrusion prevention engine whose detections feed a crowd-sourced IP reputation network, with remediation components for firewalls, proxies and CDNs

AI-native code editor from Anysphere, forked from VS Code, with inline edits, codebase-aware chat and agent mode that can run multi-step changes

Community chat platform with servers, text and voice channels, video, forums and a bot API, free to use with optional Nitro subscriptions

Hosted voice AI platform: text-to-speech and speech-to-text models, voice cloning, dubbing, music and sound effects, a voice-agent builder and a REST API with Python and TypeScript SDKs

AI research assistant that finds papers, extracts structured data from them into tables and runs systematic-review style workflows and reports

Ethereum block explorer and multichain REST API exposing balances, transactions, token transfers, verified contract source, logs and gas data

Open-source virtual whiteboard for hand-drawn-style diagrams with live collaboration, embeddable as a React component, plus a hosted Excalidraw+ service

Platform that runs Docker images as Fly Machines (Firecracker microVMs) in regions around the world with anycast routing, private networking and managed Postgres