t.me
A Telegram channel that offers ebooks on the Dao, covering meditation, herbalism, qigong, taiji and TCM. Most documents are PDF or EPUB, and users with Telegram can view and join the channel.
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dbpedia.org
DBpedia is an open knowledge graph project supported by the DBpedia Association and a global contributor community. It aggregates cleaned structured data from Wikipedia across all languages and Wikidata, providing access to more than 228 million linked entities. The project offers data, tools and services for research and industry use, and is a core resource of the Linked Open Data cloud.
diybookscanner.org
A community of people who build book scanners for digitizing the pages of books, described as the missing link between a bookshelf and an e-reader. The site explains scanner components including cameras, a controller, a rig, lighting, a platen, and a V-shaped cradle.
djvu.sourceforge.net
DjVuLibre is an open source GPL implementation of DjVu, a format and software platform for distributing documents and images. It includes viewers, a browser plug-in for Unix browsers, command line tools for encoding and decoding, and a C++ library. The best encoders are proprietary and not included.
greasyfork.org
DL Button is a userscript that adds a Sci-Hub access button to academic article pages. It supports Google Scholar, Bing Academic, and Baidu Xueshu, and redirects CNKI English article pages to corresponding Chinese versions. Installation requires a compatible userscript manager extension such as Tampermonkey or Violentmonkey.
greasyfork.org
DOI Redirect is a userscript page for browser customization, automation, or interface changes.
dotepub.com
Cloud-based software that converts webpages into e-books for e-readers. It is offered as a bookmarklet, browser extensions for Chrome, Firefox, Safari and Edge, a widget and an API. A Creator tool makes e-books from a text of one's own, and a WordPress plugin embeds the widget.
greasyfork.org
Download Button is a userscript page for browser customization, automation, or interface changes.
ecalc.ch
eCalc provides simulation tools for electric drives, including calculators for airplane propellers, multirotors, helicopters, EDF jets, and electric cars. The site lists a motor database and a restricted free demo version with reduced functionality and partial database access. It has been presented as offering reliable predictions since 2004.
kindlemodshelf.me
Editor helps digitize, convert, organize, or manage ebooks and reading libraries.
kindlemodshelf.me
Editor helps digitize, convert, organize, or manage ebooks and reading libraries.
engaging-data.com
Engaging Data is a virtual workshop and gallery of JavaScript tools, data visualizations, calculators and maps on topics including maps, environment, energy, finance, politics, health and math. A post covers how mask wearing and effectiveness can reduce the coronavirus transmission rate R0; that visualization does not account for vaccines, which the source calls a limitation.
engineersedge.com
Engineers Edge is an engineering reference site offering calculators, charts and tools for structural, mechanical and design work. It includes beam and stress calculators, fastener and bolt design resources, flat plate deflection equations, and applications such as a 2D statics modeler, GD&T writer and gear builder. Premium design and engineering spreadsheets require an annual membership.
ofoct.com
ePub Reader Online helps digitize, convert, organize, or manage ebooks and reading libraries.
github.com
EPUB Translator is a code project with source, releases, documentation, or setup notes.
github.com
epub-creator is a code project with source, releases, documentation, or setup notes.
github.com
epub-translator is a code project with source, releases, documentation, or setup notes.
epub.pub
EpubPuB is a site for reading books online and downloading eBooks. It lists free books by indie authors across genres such as romance, fantasy, thriller, short stories, young adult and horror, and states that over 10,000 eBooks are available to read online.
exoplanetarchive.ipac.caltech.edu
A service of the NASA Exoplanet Science Institute that hosts data on confirmed planets and candidates, including TESS, Kepler/K2 and JWST products. It provides search and query tools, mission data holdings, and AstroFetch, an AI assistant that answers natural-language questions using archive data.
exploitee.rs
Exploitee.rs is a hardware security research collective that finds vulnerabilities in embedded devices, IoT products and mobile systems. It lists research areas including IoT security, entertainment systems, home automation and mobile security, and offers breakout boards, a Hacker Pager and a shop of hardware security tools.
ifixit.com
A global community site where people help each other repair devices. It offers step-by-step repair guides, an Answers forum for troubleshooting, and parts and tools for DIY repairs. Users can write guides and translate or review existing ones.
ireaderorg.netlify.app
IReader is an open-source reader app for reading light novels, web novels and ebooks, available for Android and desktop. It offers AI text-to-speech on desktop via Piper TTS, installable content sources as extensions, customizable themes and offline reading. The app reports no ads or tracking. The FAQ states it runs on Android 6.0 or newer without root access.
itsfoss.com
ItsFOSS Guide helps digitize, convert, organize, or manage ebooks and reading libraries.
github.com
Kindle Comic Converter is a code project with source, releases, documentation, or setup notes.