Discover Free Online Tools
Browser-based utilities and practical tools for development, media, productivity, data, and everyday workflows.
Acade.ai
All-in-one AI research assistant for students and academics that connects to Google Scholar and PubMed for literature search, citation generation, and manuscript drafting; offers a free trial with no
AccuRanker
AccuRanker is a keyword rank tracking tool that monitors the SERP positions of thousands of search terms that drive traffic to your websites. It works with Google, Bing, YouTube, Baidu, and Yandex.
Adaptive-RAG
Adaptive-RAG is a research implementation that routes questions among no-retrieval, single-step, and iterative retrieval strategies according to predicted complexity.
AISummarizer
Free AI tool that summarizes text, PDFs, Word docs, PPTs, and videos using NLP, with a free tier of 30 credits and support for 50+ languages.
Algolia
Hosted full-text and typo-tolerant search with instant relevance, analytics and AI ranking.
Allyhub
AI agent platform that executes browsing, research, and reporting tasks from plain-language commands or ready-made workflows, with daily free credits for new users.
Annoy
Annoy is Spotify's read-optimized approximate-nearest-neighbor library using memory-mapped forests of random-projection trees for static vector collections.
Anserini
Anserini is Castorini's Java IR toolkit built on Lucene for indexing, BM25 retrieval, impact scoring, evaluation, and reproducible research baselines.
AnswerThePublic
AI-powered content idea generator based on real search queries (3 free searches/day).
Apache Lucene
Apache Lucene is the Java search library underlying many search platforms, with inverted indexes, BM25 ranking, faceting, filters, query parsing, and vector search.
Apache Solr
Apache Solr is a distributed search server built on Lucene with full-text retrieval, faceting, replication, streaming expressions, learning-to-rank, and dense-vector search.
ArangoDB
ArangoDB is a multi-model database for graphs, documents, key-values, full-text, and vector search, with GraphRAG integrations and managed services.
Directory metadata includes openly licensed data from AutoVenture, The AltStack, Awesome SaaS Alternatives, and RAG Retrieval Tools. Product Hunt metadata is fetched only through its official API when enabled.