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Standard Ebooks is a volunteer-driven project producing new editions of public domain ebooks. It takes ebooks from sources like Project Gutenberg, formats and typesets them using a style manual, proofreads and corrects them, and builds new editions. The ebooks are free of cost and free of U.S. copyright restrictions.
AutoChords is a chord progression generator. Users choose a progression type and key, and the tool shows the main progression with its notes, alternative progressions derived from the circle of fifths, and all standard chords in the key. It includes a randomize option and an edit/export function.
Dimensions.com is a reference database of dimensioned drawings and models documenting standard measurements and sizes of everyday objects and spaces. Its resources are offered to professional designers, students, and the public. It was founded by architect Bryan Maddock and is developed through the architecture practice Fantastic Offense. Downloads are available in 2D formats (.DWG, .SVG, .JPG) and 3D formats (.3DM, .SKP, .OBJ).
EbookPDF is a free digital library search engine that indexes open-access PDF textbooks, academic research papers, classic literature and professional manuals. Users search by title, author or topic to find full-text documents, and all indexed documents are available for free preview and educational download without subscription or registration. Downloads are in standard PDF format.
LunchBox Sessions is an industrial training library focused on hydraulic and electrical troubleshooting. It offers lessons, 3D videos, quizzes, puzzles and interactive Live Schematic simulations covering basics, schematic reading, components and measurements. A Standard Membership costs $29/month or $249/year and includes unlimited access to all materials. An Instructor Membership is required to show materials to other people.
The NIST Chemistry WebBook provides access to chemical and physical property data for chemical species over the internet. Data come from collections maintained by the NIST Standard Reference Data Program and outside contributors. The system organizes data by chemical species, allows searching by various means, and displays data including thermochemical and thermophysical properties and optical, electronic and mass spectra.
Nyora is a free online manga reader that runs in the browser without install or sign-up. It offers a standard and webtoon reader, favourites, reading history, AniList tracking and Google cloud sync, and is an installable, offline-capable PWA also available on Android, Windows, macOS, Linux and iOS.
A guide by Dan on solving the 3x3x3 Rubik's Cube, using standard Western (WCA) notation. It covers the Beginner Method in full and an intermediate approach to CFOP, with sections on solving speed, notation and core methods.
The Tree Proof Generator is a web tool that accepts formulas of standard propositional, predicate or modal logic and tries to find either a countermodel or a tree proof, also called a semantic tableau. It supports classical propositional logic, first-order predicate logic with functions and identity, and a few normal modal logics.
