Search results

Basic Knowledge 101 is a public domain education knowledge base that compiles 18 years of research into a downloadable, constantly updated resource for students, teachers, tutors and self-directed learners. It provides high-quality educational content focused on developing human intelligence, real-life skills, and free thinking. The decentralized, people-funded project plans to launch an AI teaching assistant for student guidance and a 24/7 operational school in the future.

BehindTheName

behindthename.com

A reference site listing given names with their meanings, etymology and history, plus usage, scripts and pronunciation where available. It also offers popularity lists, message boards, a random namer and surname information, and name-of-the-day entries.

Bestiary

bestiary.ca

A reference site listing beasts found in medieval bestiaries and the Physiologus, as well as animals from medieval encyclopedias and other sources. It offers alphabetic, cross-reference and category indexes, with variants from Latin, French, German, Icelandic, Catalan and Castilian among other languages.

BetterExplained

betterexplained.com

BetterExplained is an educational site offering intuitive math lessons. It covers topics such as imaginary numbers, exponents, trigonometry, the Fourier transform and linear algebra. The site presents the ADEPT learning method, which starts with analogies rather than memorization. It also offers a Math, Better Explained ebook and a calculus course readable free online.

Biology Online

biologyonline.com

Biology Online is described as a database of biology terms and topics, offering search over terms, news and articles. The site states it has existed since 2001 and addresses biology questions from professors, students and professionals.

BioNinja

ib.bioninja.com.au

BioNinja is a website built to cover the IBDP Biology curriculum, with information on syllabus components organised by topics or themes. It also offers experimental skills summaries, Powerpoints, summary notes, data analysis tasks and quizzes. The site notes it is a free resource set up by a single teacher and a work in progress.

BOINC

boinc.berkeley.edu

An open-source software platform for distributed computing using volunteered resources. The BOINC app downloads scientific computing jobs and runs them in the background on a user's computer. About 30 science projects use it, investigating diseases, climate change, pulsars and other research.

Book DNA

bookdna.com

Book DNA is an indie book platform built for readers by readers. It offers handpicked book recommendations from readers, and 14,000+ authors and interesting people share favorite books around topics, themes and moods. Readers can share their top 3 reads of 2026 and receive a page showing their favorite reads.

Book Series in Order

bookseriesinorder.com

BookSeriesInOrder.com is a resource that lists book series in order, organized by author and then by character or series. It provides publication order and chronological order where applicable. The site reports over 10,000 authors listed and more than 18,000 total listings, with additions each month.

Books Search

books-search.typesense.org

Books Search is a search interface for finding books from the OpenLibrary database, sourced from the Internet Archive, using Typesense. The site states it allows instant searching through 28 million books.

Brainkit

braink.it

Brainkit is a reference site that collects cognitive biases, decision tools, illusions, paradoxes and psychological experiments, presenting them as material on how the human brain works and how life situations might be improved by knowing about them. It states its content was generated by ChatGPT-4 and is for informational purposes only.

BrainScale

brainscale.net

BrainScale is an online brain training platform offering science-backed exercises including Dual N-Back, logic games, mental math, and real-life mental challenges. It is designed to improve users' memory, focus, and reasoning. The platform is SSL secured and prioritizes user privacy. Its dedicated training app provides progress statistics for Dual N-Back exercises.

Bridge Command

bridgecommand.co.uk

Bridge Command is a free, open source interactive 3D ship and radar simulator for Windows, Apple macOS and Linux, released under the General Public Licence v2. It is intended as a training tool for navigation, radar, ship handling and other seamanship skills, with configurable ships, buoys, environmental models and scenarios.

Digital Dictionary of Buddhism is an online Buddhist reference dictionary, established in July 1995 and updated monthly. Its entry page reports 79,550 entries and notes that non-members can log in as guest. It indexes terms, texts, persons, temples, schools and places.

By the Fireplace

bythefireplace.com

A site offering a large collection of classic, public-domain books and short stories in a book-like format. The site states it holds 1,762 books and 1,194 short stories from 297 authors. Free registration with a username and password allows users to set bookmarks.

byGosh.com offers illustrated classic books and stories for children, short stories, novels, nonfiction and poems. It also provides a 'Listen to This Page' feature with four voices, though the site notes it does not work on some devices.

calibre

calibre-ebook.com

Calibre is e-book management software described as a one stop solution for e-book needs. It includes an e-book editor, format conversion guidance and a user manual, with introductory videos, an FAQ list and a Quick Start Guide added to the library on first run.

Caltech Library

authors.library.caltech.edu

CaltechAUTHORS is the Caltech Library's online repository for works by Caltech-affiliated authors. It hosts recent uploads of academic outputs, supports simple, phrase, field, date range and advanced searches, allows result sorting by recency or best match, and offers a REST API for data access.

A digital library of Latin texts from early modern Europe, built from successive projects at Heidelberg University and the University of Mannheim. It offers five collections, including Neo-Latin poetry, historical and political writing, and reference works, plus a database of words and names linked to dictionaries.

CandlApp

candlapp.com

CandlApp is a personal book tracker for recording books, notes and reading goals in a private library. It supports importing a library from Goodreads, marking books as reading, planned or read, and tracking progress page by page. It offers notes with spaced repetition, reading goals, statistics and favorite authors. A free plan is limited to 100 books; the Avid Reader plan is $8.90 per month.

CarPDFManual

carpdfmanual.com

CarPDFManual is a directory that organizes car owner's manuals, service and repair guides, wiring diagrams, fault codes and technical resources by vehicle brand. The site states it lists 96 brands and 4,410 listed manuals, and also covers diagnostic scanner information.

CBR Reader

cdisplayex.com

CDisplayEx is a comic book reader for Android and Windows. It reads comic book formats including CBR, CBZ and PDF, as well as Manga, and is described as loading comic books immediately.

Celestia

celestiaproject.space

Celestia is a free space simulator that provides real-time 3D visualization of space. It displays objects and orbits based on scientific data and runs on Windows, Linux, macOS, iOS and Android. Users can travel through the solar system, to over 100,000 stars, or beyond the galaxy. Its catalogues are expandable with add-ons, and users can create their own objects and planetary systems.

CelesTrack

celestrak.org

CelesTrak is a 501(c)(3) non-profit that provides orbital data and related resources to the space community. Its site offers NORAD GP element sets, a satellite catalog, conjunction reports, GPS data and space weather data. It notes that 5-digit catalog numbers ran out on 2026-07-11, so newly cataloged objects with 6-digit numbers lack GP data in TLE format.