/** @know-the-cost */
Every app in the directory, organized by pricing plan.
Completely free to use.
Free AI career platform that helps professionals move into AI from the job they have now, with 6 AI career roadmaps, 400+ server-graded practice questions, three new challenges a week, and a public leaderboard.
#Education
★ Featured
NASA Worldview is a free map for browsing, comparing, animating and downloading daily global satellite imagery from more than 1,200 NASA data products.
#OSINT & Research
Global Fishing Watch is a free, open-access map from a nonprofit that shows fishing activity, vessel tracks, encounters and shipping traffic at sea worldwide.
#OSINT & Research
crt.sh is a free search engine for certificate transparency logs that lists the TLS certificates issued for a domain, which often reveals its subdomains.
#OSINT & Research
Copernicus Browser is a free web app for viewing, comparing and downloading Sentinel satellite imagery of any place on Earth, with time-lapse and measuring tools.
#OSINT & Research
OCCRP Aleph is an investigative data platform from the OCCRP that lets journalists search company registries, court records, gazettes and leaks in one place.
#OSINT & Research
Free plan available, paid upgrades.
AI-powered prompt engineering platform that helps users create, test, optimize, organize, and deploy prompts for ChatGPT, Claude, Gemini, and other large language models through a collaborative workspace designed for prompt development and management.
#Productivity
★ Featured
Wav (formerly MusicGPT) is an AI music generator that turns a text prompt into full songs, vocals, instrumentals and sound effects, with a free plan.
#Music
Zoom Earth is an interactive weather and satellite map that shows live satellite imagery, rain radar, storm tracks, wildfires and forecasts for anywhere on Earth.
#OSINT & Research
ViewDNS.info is a set of free web tools for domain and IP research, including reverse IP, reverse WHOIS, IP history, DNS records and subdomain discovery.
#OSINT & Research
SkylineWebcams is a network of live HD webcams showing city squares, beaches, ski slopes and volcanoes around the world, free to watch with ads.
#OSINT & Research
EarthCam is a network of live streaming webcams at public landmarks, city skylines and tourist spots around the world, free to watch in a browser.
#OSINT & Research
Try before you buy.
Hunchly is a web capture tool for online investigations that automatically saves every page you visit with timestamps and hashes so you can build reports later.
#OSINT & Research
Virtual Staging AI is a real estate tool that furnishes photos of empty rooms with realistic AI-generated furniture in about 10 seconds.
#Design
Stable Audio is Stability AI's music and sound generator that creates tracks, stems and effects from text prompts or your own audio.
#Music
Smartcat is an AI localisation platform that translates, reviews and updates content in 280+ languages, with access to human linguists when needed.
#Business
Plausible is a lightweight, privacy-friendly web analytics tool and Google Analytics alternative that works without cookies, from $9 a month.
#Data & Analytics
Freed is an AI medical scribe that listens to patient visits and writes complete clinical notes about a minute after each visit ends.
#Health
Paid plans only.
North Star (nstarlive.com) is a paid, browser-based OSINT research platform from a UK team. It brings a searchable globe of public cameras, username and crypto wallet research, public-records search and photo geolocation into one workspace for journalists, researchers and investigators.
#AI
Surfer is an AI SEO content platform that scores and writes articles against top-ranking pages for marketers, agencies and content teams.
#Marketing & Social
Plaud is an AI voice recorder brand whose devices record calls and meetings, then transcribe and summarize them for busy professionals.
#Transcription
Claude Code is an agentic coding tool from Anthropic that reads your codebase, edits files, runs commands and opens pull requests for developers.
#Developer Tools
Sierra is a conversational AI platform that lets companies build branded customer service agents for chat, voice, email and messaging.
#Business
Luma AI is an AI video and image generation platform that turns text and images into cinematic clips with its Ray models for creators and brands.
#Video