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Duolingo: Master new languages with gamified, personalized learning. It is listed under Productivity on AI Registry with a free plan and paid upgrades.
The tools below are approved listings in the same category, ordered by how closely their tags match Duolingo. This is an automatic list. We have not written a researched verdict for Duolingo yet, so treat it as a shortlist and check each vendor's pricing page before switching.
Built from each tool's listing. Vendors can update their own listing after claiming it.

Create multilingual auto‑graded quizzes from existing content.
AI Quiz Generator by Coursebox turns any topic or document into a graded quiz in seconds. Users type a subject, paste a URL or upload a PDF, Word document or PowerPoint, and the generator writes questions and answers in multiple choice, true or false, fill in the blank, short answer or drag and drop formats. Every answ...
AI-driven tool for personalized, efficient travel itinerary creation.
AI Trip Planner is a small web app hosted on BuildAI.space that generates a day by day itinerary from three inputs: how many days the trip lasts, the destination and the preferred travel style. Submitting the form returns a structured plan with activities and recommendations for each day, and finished plans appear as c...

Revolutionize travel with AI-driven planning and seamless bookings.
Layla is an AI travel agent that plans trips and then books them. You give it dates, destinations, budget and travel style, and it builds a day by day itinerary covering flights, hotels, car rentals, activities and dining, using live pricing and availability. The plan can be changed in conversation, swapping a museum f...

Revolutionizes studying with tailored, AI-driven academic assistance.
Atlas is an AI workspace for students that keeps coursework, class materials and study tools in one place. Learners upload lecture slides, worksheets, screenshots, PDFs and Word documents, then ask Atlas to solve problems, draft writing, build study guides or answer questions grounded in those files. Because answers ar...

Develop autonomous AI agents with self-building and task planning.
This project is an experimental Python framework for a self building autonomous agent. Its core is a function framework that stores, manages and executes functions from a database, with a graph structure that tracks imports, dependent functions and authentication secrets, automatic loading and detailed logging. A bundl...

Turn earnings calls into quick, actionable stock research.
BeeBee is an AI analysis tool for the United States stock market that reads earnings calls, financial reports and news on an investor's behalf. For every earnings conference call transcript it produces an automated breakdown across six modules: risks and opportunities, a summary, key numbers, analysts' questions, senti...