ChatGPT is a conversational AI assistant by OpenAI that handles writing, coding, analysis, and Q&A through a simple chat interface. The free tier uses GPT-4o mini; paid plans unlock GPT-4o and advanced reasoning models.
chatwritingcoding
10
freemium
Duolingo
A gamified language learning app offering bite-sized lessons in 40+ languages, with AI-powered personalization and speaking practice.
language learninggamified40+ languages
9
freemium
Grammarly
Grammarly checks grammar, spelling, punctuation, style, and tone across browsers, desktop apps, and document editors. The Pro plan adds AI-powered full-sentence rewrites, plagiarism checking, and fluency improvements.
grammareditingtone
9
★ Featured
Perplexity AI
An AI-powered answer engine that responds to questions with cited sources drawn from live web results.
searchcitationsreal-time
9
freemium
Claude
A general-purpose AI assistant by Anthropic, designed for writing, analysis, coding, research, and extended reasoning across very long documents.
reasoninglong documentsanalysis
9
free
Khan Academy
A free online learning platform offering courses in math, science, and humanities for K-12 students, with AI tutoring powered by Khanmigo.
freeK-12math
9
★ Featured
Perplexity AI
An AI answer engine that retrieves live web content and synthesizes it into concise, fully cited summaries — letting you understand any topic, article, or document without reading the source yourself.
real-timecitationsweb search
9
freemium
Google Gemini
Google's flagship multimodal AI assistant with deep integration into Search, Workspace, and YouTube, capable of analyzing documents, images, and code with real-time web access.
multimodalGooglesearch
9
paid
Udemy
A marketplace of 210,000+ on-demand online courses taught by expert instructors, covering technology, business, design, and personal development. AI features personalize course recommendations and surface relevant content.
online coursesmarketplacecertificates
8
freemium
QuillBot
QuillBot is an AI paraphrasing, summarization, and grammar-checking tool that rewrites text while preserving meaning. It is widely used by students and ESL writers for editing and citation generation.
paraphrasingsummarizationrewriting
8
freemium
NotebookLM
Google's AI research assistant that lets you upload your own documents and ask questions directly against them, generating cited summaries and podcast-style audio overviews.
Googledocumentsaudio overview
8
freemium
Wolfram Alpha
A computational knowledge engine that answers factual and mathematical questions using curated data, symbolic computation, and step-by-step solutions.
mathsciencecomputation
8
freemium
Quizlet
An AI-enhanced study platform that generates flashcards, practice tests, and study guides from any subject material.
flashcardsstudyAI-generated
8
★ Featured
NotebookLM
Google's AI notebook that lets you upload documents and sources, then generates grounded summaries, Q&A responses, and audio overviews based exclusively on your content — with every claim cited back to the source.
Googledocument summariesaudio overview
8
freemium
Microsoft Copilot
Microsoft's AI assistant integrated into Windows, Edge, and Bing, providing web-grounded answers, image generation, and document analysis — free with a Microsoft account.
Microsoftweb searchdocuments
8
freemium
Speechify
A text-to-speech reading app that converts any document, PDF, website, or ebook into audio using natural-sounding AI voices at speeds up to 4.5x. Popular with people who have dyslexia, ADHD, or busy lifestyles.
text-to-speechreadingPDF
8
freemium
Mentimeter
An interactive presentation tool that lets audiences respond to polls, quizzes, and word clouds in real time from their phones. Used by educators, trainers, and speakers to boost engagement during live presentations.
interactivepollsquizzes
7
freemium
ChatPDF
An AI tool that instantly generates summaries of any PDF and answers questions about its content — making research papers, contracts, and long reports quick to digest without reading every page.
PDFinstant summarydocument Q&A
7
freemium
ProWritingAid
ProWritingAid is a comprehensive AI writing editor that analyzes grammar, style, readability, and consistency across 20+ report types. It integrates with Word, Google Docs, Scrivener, and major browsers, and is a strong alternative to Grammarly for writers.
grammarstyleediting
7
free
Semantic Scholar
A free AI-powered academic search engine from the Allen Institute for AI indexing 200M+ papers, with semantic search, citation graphs, and personalized research feeds.
academic searchpaperscitations
7
freemium
You.com
An AI search engine combining live web search with a conversational assistant, offering cited answers, model switching, and deep research agents.
AI searchcitationscode execution
7
free
Mendeley
A free reference manager and academic social network by Elsevier that organizes papers, generates citations, and connects researchers through a shared library of 100M+ papers.
reference managercitationsPDF
7
paid
Prezi
A presentation tool known for its non-linear, zoomable canvas format that creates visually dynamic presentations different from traditional slide decks. Includes an AI presentation maker and video presentation features.
zoomingnon-linearcanvas
7
freemium
Slidesgo
A library of thousands of free and premium AI-generated Google Slides and PowerPoint templates across dozens of themes, with an AI presentation maker that creates customized decks from a prompt.
templatesGoogle SlidesPowerPoint
7
freemium
Brilliant
An interactive STEM learning platform that teaches math, data science, programming, and science through hands-on problem-solving and visual lessons. Designed for lifelong learners from high school through professional development.
STEMinteractiveproblem-solving
7
freemium
Chegg
An academic support platform with an AI homework help tool, step-by-step textbook solutions, expert Q&A, and tutoring services. Used by millions of college students in the US for coursework assistance.
homework helptextbook solutionstutoring
7
paid
Skillshare
An online learning platform with a subscription model focused on creative and business skills, including design, photography, film, and entrepreneurship. Hosts project-based classes taught by industry practitioners.
creative skillsdesignvideo
7
freemium
Magic School AI
An AI toolkit built specifically for teachers that generates lesson plans, rubrics, differentiated instructions, parent emails, and IEP goals from simple prompts. Used by over 3 million educators.
teacherslesson plansrubrics
7
freemium
Memrise
A language learning platform that uses spaced repetition, real-world video clips of native speakers, and AI-powered conversation practice to build genuine language fluency. Offers courses in 22 languages.
language learningspaced repetitionnative speakers
7
freemium
StuDocu
A student document-sharing platform where millions of study guides, lecture notes, and past exams are uploaded by peers, with an AI summarizer that condenses uploaded documents into structured study notes.
study notespeer sharingsummaries
7
freemium
DeepL Write
A writing assistance tool by DeepL that improves phrasing and style in English and German texts, suggesting alternative word choices and rewritten sentences to make writing sound more natural. Complements DeepL Translate.
writing improvementphrasingEnglish
7
freemium
Blinkist
A book summary app that distills key ideas from 7,000+ nonfiction books and podcasts into 15-minute text and audio summaries. Used by busy professionals to absorb book insights without reading full volumes.
book summariesnonfictionaudio
6
freemium
ChatPDF
An AI tool that lets you upload any PDF and ask questions about its content, useful for extracting information from papers, reports, and manuals quickly.
PDFdocument Q&Asummaries
6
freemium
Humata
An AI document assistant that lets you upload PDFs and files to instantly receive summaries, key insights, and answers — with support for legal documents, research papers, financial reports, and more.
PDFdocument Q&Akey insights
6
freemium
ChatDOC
An AI document reading tool that extracts and summarizes content from PDFs, Word files, EPUBs, and scanned documents, returning cited answers with direct references to the source text.
PDFWordEPUB
6
free
ResearchRabbit
A free literature discovery tool that maps academic papers as an interactive network and recommends related works, syncing with Zotero for reference management.
literature discoverycitation graphZotero
6
freemium
NaturalReader
A text-to-speech software with 200+ AI voices in 50+ languages for reading documents, web pages, and ebooks aloud. Available as a web app, desktop software, and mobile app with a free tier for personal use.
text-to-speech200+ voicesebooks
6
freemium
Genially
An interactive content creation platform for building animated presentations, infographics, games, and escape rooms with no coding required. Widely used in education for gamified learning materials.
interactiveanimatedgamified
6
freemium
PopAI
An AI workspace that generates polished presentation slides, analyzes documents, and provides AI chat from a simple prompt. Known for fast, visually appealing output with a generous free tier.
AI slidesdocument analysisfast generation
6
freemium
Diffit
An AI tool for teachers that generates differentiated reading materials on any topic at any reading level, saving hours of content adaptation for diverse classrooms. Used by thousands of educators across K-12.
differentiated instructionreading levelsK-12
6
freemium
Edpuzzle
An interactive video-based learning tool that lets teachers embed questions, audio notes, and AI-generated quizzes into any video from YouTube, Khan Academy, or uploaded content. Tracks student engagement and comprehension.
video learningembedded quizzesYouTube
6
free
Pons Translator
A trusted online dictionary and translation tool by PONS publishing with over 40 years of lexicographic expertise, offering precise word-level translations with grammar context in 60+ language pairs.
dictionary60+ languagesgrammar
6
freemium
TLDR This
A free browser extension and web app that condenses any article, essay, or URL into a short bullet-point summary in seconds. Supports one-click summarization from any page without requiring account creation.
article summarybrowser extensionbullet points
6
freemium
Eightify
A Chrome extension that generates AI summaries of YouTube videos as 8 key bullet points, allowing users to decide whether a video is worth watching before investing the time. Works on any public YouTube video.
YouTubeChrome extensionbullet points
6
free
Knowt
A free AI note-taking and study tool for students that automatically converts notes, lecture slides, and documents into flashcards, practice tests, and study guides. Popular with high school and college students.
notesflashcardsstudy guide
5
freemium
Scholarcy
An AI reading assistant that converts academic papers and long documents into structured summary flashcards, extracting key findings, methods, and references in seconds.
academicflashcardskey findings
5
freemium
Resoomer
An online text summarization tool that automatically condenses argumentative texts, news articles, and documents into concise summaries, with multilingual support across English, French, Spanish, and more.
text summarizationmultilingualarticles
5
freemium
Paperpal
An AI academic writing assistant that helps researchers write, paraphrase, and polish manuscripts to meet journal submission standards, built on models trained on millions of research papers.
academic writingmanuscriptparaphrasing
5
freemium
AiPPT
An AI PowerPoint and presentation generator that creates complete, formatted slide decks from a topic or outline in under a minute. Exports directly to PPTX and integrates with Microsoft Office.
PPTX exportPowerPointAI generation
5
freemium
Numerade
An AI-powered STEM education platform with step-by-step video solutions for millions of textbook problems, plus an AI tutor called Ace that provides personalized hints and explanations.
STEMvideo solutionstextbook
5
freemium
Quizgecko
An AI quiz generator that turns any text, URL, PDF, or document into multiple-choice, true/false, and open-ended questions in seconds. Used by educators and trainers to create assessments without writing questions manually.
quiz generationassessmentPDF
5
freemium
Curipod
An AI-powered lesson creation tool that generates interactive classroom presentations with polls, word clouds, and reflection prompts in seconds. Designed for K-12 teachers who want engaging, participatory lessons.
lesson plansK-12interactive
5
freemium
SchoolAI
An AI learning platform for K-12 students that provides personalized tutoring across subjects while giving teachers real-time visibility into student interactions and insights. Includes safety guardrails appropriate for minors.
K-12tutoringteacher insights
5
freemium
Formative
An AI-enhanced assessment platform that lets teachers create real-time formative assessments, track live student responses, and use AI to auto-score open-ended answers. Used in K-12 classrooms for data-driven instruction.
assessmentreal-timeauto-grading
5
freemium
Kagi Summarizer
A fast, ad-free AI universal summarizer by Kagi that condenses articles, PDFs, YouTube videos, and podcasts into structured bullet summaries. Supports 26 languages and is built into the Kagi search engine.
universal summarizerYouTubePDF
5
freemium
Mindgrasp AI
An AI document and media summarizer that creates notes, flashcards, Q&A sets, and quizzes from PDFs, videos, audio files, and web content. Designed for students and professionals who learn from diverse content formats.
flashcardsquizzesPDF
5
free
Summarize.tech
A free web tool that generates concise AI summaries of any YouTube video by entering its URL, without requiring a login. Provides a chapter-by-chapter breakdown for longer videos.
YouTubefreeURL
5
freemium
Sharly AI
An AI document summarizer and chat tool that lets users upload multiple PDFs and documents simultaneously for cross-document Q&A and instant summaries. Useful for comparing sources or quickly extracting insights from document collections.
multi-documentPDFcross-document Q&A
5
freemium
Wiseone
An AI-powered browser extension that provides instant definitions, related context, and cross-source summaries while you read web articles. Helps readers understand complex topics without leaving the page.
browser extensionin-contextdefinitions
5
freemium
Glarity
A free browser extension that adds AI-generated summaries directly into YouTube and Google search results, letting users skim video transcripts or article snippets without opening each page. Supports multiple AI models.
YouTubeGoogle searchinline summaries
5
freemium
NoteGPT
An AI-powered note-taking and summarization tool that generates transcripts and summaries of YouTube videos, web articles, and uploaded files, then organizes them into structured notes. Includes a mind map generator.
YouTube summarymind mapsnotes
5
freemium
Bearly AI
An AI reading and research tool that summarizes papers, articles, and documents from a keyboard shortcut, with a unified workspace for annotating and chatting with multiple sources simultaneously. Designed for researchers and analysts who read heavily.
researchpaperskeyboard shortcut
4
freemium
Scholarcy
An AI reading assistant that converts academic papers into structured flashcard summaries, extracting key findings, methods, and reference lists.
papersflashcardssummaries
4
paid
Genei
An AI research productivity tool that automatically summarizes PDFs and web pages and extracts key information, helping researchers process large volumes of material.
PDF summarieskeyword extractionresearch
4
freemium
Sendsteps
An AI presentation maker that generates complete interactive slide decks with audience response features from a topic description. Supports live polls, Q&A, and quizzes directly embedded in the slides.
AI generationinteractivepolls
4
freemium
Haiku Deck
A simple AI-assisted presentation tool that emphasizes clean, image-driven slides over text-heavy layouts. Automatically sources full-bleed stock photos from a Creative Commons library to match each slide topic.
simpleimage-drivenstock photos
4
freemium
Yomu AI
An AI writing and summarization assistant for academic work that helps students write research papers, summarize sources, and avoid plagiarism with proper citations. Supports academic document styles including APA, MLA, and Chicago.