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The Linux Command Line by William Shotts is a 596-page book for new command line users covering command line use, shell scripting and common command line programs. Released under a BY-NC-ND Creative Commons license, it is available as a free PDF download. A sequel, Adventures with the Linux Command Line, is also available as a free PDF download.
Lord Byron and his Times is a growing digital archive of books, pamphlets and periodical essays illustrating the causes and controversies surrounding Byron and his contemporaries. It uses notes, commentary and links to show relationships among readers and writers, and database technology to track personages across documents. Documents are made available under a Creative Commons license for free circulation and reuse with acknowledgement of the source.
The National Institute of Polar Research Science Database is a metadata portal organizing polar science data into categories including space and upper atmospheric sciences, meteorology and glaciology, geoscience, and bioscience. It also covers governmental institutions, project monitoring, IPY, Arctic, and Umitakamaru. The database provides search, DOI attribution, and a data policy, and is licensed under Creative Commons Attribution 3.0 Unported.
Search openly licensed images and audio from cultural, educational and media collections.
PandaCD is a file-sharing community where artists share their own music under Creative Commons and artist-permitted licences. Users can pay what they want with cryptocurrency, and the site lists torrents filtered by tags, licence and payment option.
PhyloPic is an open database of free silhouette images of animals, plants, and other life forms. The silhouettes are available for reuse under Creative Commons licenses and can be downloaded for educational materials, research articles, and other projects. The site also offers API access and accepts uploaded silhouettes.
PlanetMath is a virtual community aiming to make mathematical knowledge more accessible. Its main feature is a mathematics encyclopedia with entries written and reviewed by members, contributed under the Creative Commons By/Share-Alike License and written in LaTeX.
SciAlert is an AI-supported international scientific publisher and journal-hosting platform. It hosts more than 50,000 fully open-access peer-reviewed articles, provides publishing services including rigorous peer review, copyediting, and impact tracking, and uses the Creative Commons Attribution license for author copyright retention. It offers resources for authors, editors, referees, librarians, and scholarly societies, plus an indexed research database called the ASCI Database.
A tutorial project for applying machine learning in Python with scikit-learn, a Python module built on numpy and scipy. It aims to teach practical application of scikit-learn algorithms; the stated audience is experienced Python developers familiar with numpy and scipy. Prebuilt PDF and HTML versions, tutorial source and exercise solutions are available, and the material is under a Creative Commons Attribution 3.0 license.
Silk is an interactive generative art tool that enables users to create flowing digital artworks. Users can drag colors to blend, toggle mirror across center on/off and spiral towards center on/off, save created images via right-click, and undo actions. It was created by Yuri Vishnevsky, with music and sound crafted by Mat Jarvis. Art shared via Silk is licensed under Creative Commons.
Simple Wiki is the Simple English Wikipedia, a free, collaboratively edited online encyclopedia that uses basic English vocabulary and shorter sentences. It is designed for users learning English, including children and adult learners, and hosts over 285,704 articles. All content is available under the Creative Commons Attribution/Share-Alike License 4.0 International and the GNU Free Documentation License, and any user can create or edit pages.
Sketchfab is a platform for publishing, sharing, and discovering 3D content on web, mobile, AR, and VR. It offers a universal 3D/VR viewer that works in all browsers and operating systems without a plugin, and uses compression to deliver models. Users can embed and share 3D models on websites, forums, and social media. The site also offers free 3D models under Creative Commons licenses.
A website providing solutions to the exercises from Hadley Wickham's Advanced R, 2nd edition. It is also the companion site for a print book listed for release in Chapman & Hall's R Series. The work as a whole is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
SS64 is a reference guide containing syntax and examples for prevalent computing commands for database and operating systems, covering Windows CMD, PowerShell, MacOS, Linux bash and SQL Server. The site is developed by Simon Sheppard and distributed under a Creative Commons Attribution-NonCommercial licence.
Subtle Patterns is a Toptal-provided collection of free textures for web projects. The library includes patterns such as Pink Flowers, Moroccan Flower, Watercolor, Leaves, Paisley, Dark Denim and Fancy Cushion, each with a listed creator and date and a download link. Submissions must be tileable PNG or GIF files created by the uploader, and accepted entries are made available free under Creative Commons.
A music theory website offering articles, reference material and interactive exercises. It hosts analyses of works by Bach and provides a today in music history section. The site is published under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Text Mining with R: A Tidy Approach is a website for a guide to text analysis within the tidy data framework, using the tidytext package and other tidy tools. It is written by Julia Silge and David Robinson and licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License.
Think Stats is an introduction to probability and statistics for Python programmers, emphasizing simple techniques for exploring real data sets and answering questions. It includes case studies using datasets from the National Institutes of Health and other sources, with exercises using short programs. The second edition is no longer current and is available under a Creative Commons license.
A PDF version of the Toki Pona Dictionary, compiled by Sonja Lang and released in 2021. The Wikimedia Commons file runs 392 pages and omits the book cover and pages 393 through 402, which feature creative works by different authors. The author released the contents to the public domain.
Unglue.it is a site for finding and supporting free ebooks published under Creative Commons licenses in EPUB, MOBI, and PDF formats. The site states it lists over 250,000 free ebooks and offers an OPDS catalog feed for browsing them.
Vantor's Open Data Program provides free satellite imagery and spatial intelligence to first responders for disaster response and recovery. Imagery is released before and after events into the public domain under a Creative Commons BY-NC 4.0 license. The program activates when a sudden onset disaster is categorized as major and a Vantor FirstLook event service has been activated.
VectorPortal is a library of free stock vector graphics, clipart and SVG files. Every file is released under the Creative Commons Attribution license (CC BY 4.0), permitting modification, sharing and adaptation with proper credit. New content from the community is added daily, and the site includes a curated Handpicked Collection.
Wikilivres, also known as Bibliowiki, is a free online library of creative works, mainly texts and images, that are in the public domain or under a free licence. It is hosted in New Zealand and follows New Zealand copyright law. It accepts works that cannot be hosted on Wikimedia Commons or Wikisource.
A collection of controller prompt assets released under the Creative Commons 0 (CC0) public domain license, made by Nicolae (XELU) Berbece and updated by Paul Paun in 2021. The assets are described as completely free to use in any personal or commercial project.
