#1
Obsidian

Obsidian

★★★★★ 4.7 Free / $4+ Free plan

A knowledge base that works on local Markdown files.

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✓ 100% offline✓ Local-first✓ Plugin ecosystem
#2
Tally

Tally

★★★★★ 4.7 Free / $29+ Free plan

Free form builder that works like a document, offering unlimited forms and responses with conditional logic, payments, and integrations without complex UI.

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✓ Unlimited forms and responses on free plan✓ Document-style editor (no drag-and-drop complexity)✓ Built-in payment collection via Stripe
#3
Claude

Claude

★★★★★ 4.6 Free / $20+ Free plan

AI assistant by Anthropic focused on safety and helpfulness.

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✓ Long context window✓ Great at writing✓ Thoughtful responses
#4
Flux

Flux

★★★★★ 4.6 Free / $0.05+ Free plan

State-of-the-art open-source image model by Black Forest Labs (ex-Stability AI founders) rivaling Midjourney in quality.

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✓ Best open-source image quality available✓ Excellent text rendering in generated images✓ Multiple model sizes (Schnell, Dev, Pro)
#5
Whisper (OpenAI)

Whisper (OpenAI)

★★★★★ 4.6 Free / $0+ Free plan

Open-source automatic speech recognition model by OpenAI supporting 99 languages with robust transcription and translation capabilities.

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✓ Completely free and open-source for self-hosting✓ Supports 99 languages out of the box✓ Excellent accuracy on diverse audio types
#6

Kagi

★★★★★ 4.6 $5+

Ad-free, privacy-focused search engine with AI summaries and customizable results.

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✓ No ads or tracking✓ Customizable results✓ AI-powered summaries
#7

Heptabase

★★★★★ 4.6 $11.99+

Visual note-taking tool that helps you make sense of complex topics using whiteboards, cards, and mindmaps to visually organize your knowledge and research.

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✓ Visual-first approach to note-taking✓ Whiteboards for spatial thinking✓ Card-based system is very flexible
#8
OpenAI Whisper

OpenAI Whisper

★★★★★ 4.6 Free / $0.006+ Free plan

Open-source automatic speech recognition model supporting 99 languages.

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✓ Free and open-source✓ 99 languages✓ High accuracy
#9
Tally Forms

Tally Forms

★★★★★ 4.6 Free / $29+ Free plan

Simple and powerful form builder that works like a document with no limits on free.

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✓ Unlimited forms on free✓ No-code logic✓ Beautiful design
#10
Perplexity AI

Perplexity AI

★★★★★ 4.5 Free / $20+ Free plan

AI-powered search engine with cited answers.

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✓ Source citations✓ Real-time web access✓ Focus modes
#11
Elicit

Elicit

★★★★★ 4.5 Free / $10+ Free plan

AI research assistant that finds, summarizes, and extracts data from academic papers.

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✓ Searches 125M+ academic papers✓ Extracts structured data from papers✓ Summarizes findings across multiple studies
#12
Stable Diffusion

Stable Diffusion

★★★★★ 4.5 Free / $0.01+ Free plan

Open-source image generation model by Stability AI that runs locally or via cloud API with full control over outputs.

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✓ Completely free to run locally✓ Full creative control with no content restrictions✓ Massive community of models, LoRAs, and extensions
#13
Arc Browser

Arc Browser

★★★★★ 4.5 Free Free plan

Reimagined web browser by The Browser Company featuring vertical tabs, spaces for context switching, built-in tools replacing extensions, and AI-powered features.

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✓ Innovative sidebar with vertical tabs and spaces✓ Built-in tools (notes, easel, split view) reduce extensions✓ Profiles and spaces for work/personal separation
#14
Research Rabbit

Research Rabbit

★★★★★ 4.5 Free Free plan

Free research discovery app that helps find related papers and visualize connections.

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✓ Completely free✓ Visual paper networks✓ Collection management
#15
Zotero

Zotero

★★★★★ 4.5 Free / $20+ Free plan

Free open-source reference manager for collecting, organizing, and citing research.

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✓ Free and open-source✓ Browser extension✓ Group libraries
#16
Scrivener

Scrivener

★★★★★ 4.5 $23.99+

Long-form writing tool designed for novelists, researchers, and screenwriters.

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✓ Great for long documents✓ Powerful organization✓ Research binder
#17
Anki

Anki

★★★★★ 4.5 Free / $24.99+ Free plan

Spaced repetition flashcard program for efficient long-term memorization.

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✓ Free desktop/Android✓ Spaced repetition✓ Highly customizable
#18
Logseq

Logseq

★★★★ 4.4 Free / $5+ Free plan

Open-source, local-first knowledge management tool based on outliner and bidirectional links.

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✓ 100% open-source✓ Local-first and privacy-friendly✓ Powerful outliner structure
#19
Typeform

Typeform

★★★★ 4.4 Free / $25+ Free plan

Conversational form and survey builder creating one-question-at-a-time experiences with beautiful design, logic branching, and high completion rates.

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✓ Beautiful one-question-at-a-time interface✓ Higher completion rates than traditional forms✓ Advanced logic branching and personalization
#20
Anytype

Anytype

★★★★ 4.4 Free / $10+ Free plan

Local-first, open-source knowledge management tool with end-to-end encryption, graph-based relations, and type system for personal and team knowledge bases.

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✓ Local-first with end-to-end encryption✓ Open-source with peer-to-peer sync✓ Powerful type system and relations
#21

Consensus

★★★★ 4.4 Free / $8.99+ Free plan

AI-powered academic search engine that finds and synthesizes answers from peer-reviewed scientific papers, providing evidence-based responses with citations.

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✓ Answers backed by peer-reviewed research✓ Consensus meter shows scientific agreement✓ Copilot summarizes findings
#22

Semantic Scholar

★★★★ 4.4 Free Free plan

AI-powered research tool by Allen Institute for AI that helps scholars find relevant papers using semantic understanding, with TLDR summaries and citation analysis.

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✓ Completely free to use✓ AI-generated paper summaries (TLDR)✓ Influence and citation metrics
#23

Capacities

★★★★ 4.4 Free / $9.99+ Free plan

Object-based note-taking app that structures information as interconnected objects (people, books, meetings) rather than pages, inspired by how the brain works.

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✓ Unique object-based approach✓ Daily notes with automatic linking✓ Beautiful and intuitive interface
#24
Typeform

Typeform

★★★★ 4.4 Free / $25+ Free plan

Conversational form builder creating engaging surveys and quizzes one question at a time.

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✓ Beautiful conversational UI✓ High completion rates✓ Logic jumps
#25
QuillBot

QuillBot

★★★★ 4.3 Free / $9.95+ Free plan

AI paraphrasing and writing tool for rewording, grammar checking, summarizing, and translating text.

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✓ Excellent paraphrasing with multiple modes✓ Integrated grammar checker✓ Works within Google Docs and Word
#26
Mistral AI

Mistral AI

★★★★ 4.3 Free / $14.99+ Free plan

European AI lab offering open-weight and commercial LLMs with Le Chat conversational interface and enterprise API.

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✓ Open-weight models available for self-hosting✓ Excellent multilingual performance especially in European languages✓ Fast inference speeds
#27

CrewAI

★★★★ 4.3 Free / $200+ Free plan

Open-source framework for orchestrating autonomous AI agents that work together in crews, each with specific roles, goals, and tools to accomplish complex tasks.

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✓ Open-source Python framework✓ Role-based agent design✓ Growing tool ecosystem
#28

Tana

★★★★ 4.3 Free / $12+ Free plan

AI-powered workspace combining notes, tasks, and data with a unique supertag system that makes every piece of information a queryable node in your knowledge graph.

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✓ Supertags create structured data effortlessly✓ Powerful AI-powered search and commands✓ Everything is queryable and linked
#29
Connected Papers

Connected Papers

★★★★ 4.3 Free / $3+ Free plan

Visual tool to explore academic papers and find related work through graph visualization.

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✓ Visual graph exploration✓ Free tier available✓ Easy to use
#30
Rev

Rev

★★★★ 4.3 $0.25+

Transcription service offering both AI and human transcription with high accuracy.

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✓ Human transcription option✓ High accuracy✓ Fast turnaround
#31
Standard Notes

Standard Notes

★★★★ 4.3 Free / $7.5+ Free plan

Encrypted notes app focused on longevity, portability, and privacy.

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✓ End-to-end encrypted✓ 100-year company promise✓ Cross-platform
#32
CrewAI

CrewAI

★★★★ 4.3 Free Free plan

Open-source framework for orchestrating role-playing autonomous AI agents.

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✓ Open-source✓ Role-based agents✓ Easy to learn
#33
Fibery

Fibery

★★★★ 4.3 Free / $10+ Free plan

Connected workspace for product teams combining strategy, discovery, and delivery.

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✓ Highly connected✓ Custom entities✓ Good for product teams
#34
You.com

You.com

★★★★ 4.2 Free / $15+ Free plan

AI-powered search engine with conversational interface, code generation, and multi-modal capabilities.

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✓ No ads in search results✓ Multiple AI models available (GPT-4, Claude)✓ Real-time web search with citations
#35
Poe

Poe

★★★★ 4.2 Free / $19.99+ Free plan

AI chat aggregator by Quora providing access to GPT-4, Claude, Gemini, and other models in a single interface.

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✓ Access multiple AI models in one place✓ Create and share custom bots✓ Compare outputs across different models
#36

Exa

★★★★ 4.2 Free / $100+ Free plan

AI-powered search API that finds content using neural embeddings instead of keywords, designed for developers building AI applications that need web knowledge.

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✓ Semantic search beyond keywords✓ Clean API for developers✓ Returns full page content
#37

Mem

★★★★ 4.2 Free / $14.99+ Free plan

AI-powered note-taking tool that automatically organizes your notes and surfaces relevant information when you need it, without manual folder structures.

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✓ AI auto-organizes notes✓ No folder structure needed✓ Smart search finds related content
#38
Sonix

Sonix

★★★★ 4.2 $5+

Automated transcription platform with translation and subtitle generation.

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✓ 40+ languages✓ Good accuracy✓ Subtitle export
#39
You.com

You.com

★★★★ 4.2 Free / $15+ Free plan

AI-powered search engine with customizable results and built-in AI chat.

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✓ AI-powered answers✓ Privacy focused✓ Multiple AI models
#40
Roam Research

Roam Research

★★★★ 4.1 $15+

Networked thought tool with bidirectional linking and daily notes for building a personal knowledge graph.

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✓ Bidirectional links surface unexpected connections✓ Block-level referencing for atomic notes✓ Daily notes workflow reduces friction
#41
Grok

Grok

★★★★ 4 Free / $22+ Free plan

xAI's AI chatbot with real-time access to X (Twitter) posts, news, and web search with an unfiltered conversational style.

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✓ Real-time access to X posts and trending topics✓ Less restrictive content policies than competitors✓ DeepSearch for thorough multi-step research
#42
Mendeley

Mendeley

★★★★ 4 Free Free plan

Reference manager and academic social network for organizing research papers.

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✓ Free✓ Social network features✓ Good PDF reader
#43
Evernote

Evernote

★★★★ 3.8 Free / $10.83+ Free plan

Note-taking app for capturing and organizing ideas.

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✓ Great web clipper✓ OCR for images✓ Cross-platform

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