LibreOffice is a free, open source office suite developed by a community and a project of The Document Foundation. It includes six tools: Writer for word processing, Calc for spreadsheets, Impress for presentations, Draw for diagrams and 3D illustrations, Base for databases, and Math for formulas. The project offers no-cost downloads and community assistance rather than technical support from the foundation.
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LibrePCB is a free, open-source, cross-platform electronic design automation suite for drawing schematics and designing printed circuit boards. It offers a schematic editor and board editor, a semantic library concept, human-readable file formats, and optional library manager and PCB fabrication service. A command-line tool supports headless checks and data exports. It is available in 15 languages and can be used fully offline.
LibreSpeed is a free and open source speedtest that runs in the browser or can be self-hosted on a PHP, Golang, Rust or Node server. It is licensed under LGPL and measures download, upload, ping, and jitter without Flash, Java, or Websockets.
LibreTexts is a non-profit open education resource platform for creating, customizing and sharing textbooks, adaptive homework and ancillary materials. It offers 17 subject libraries and over 2,000 textbooks, supports remixing chapters into custom textbooks, and includes the ADAPT homework system with a shared question bank.
LibreTexts language bookshelf with open textbooks and learning material for many languages.
LibreTorrent is a code project with source, releases, documentation, or setup notes.
LibreTranslate is a free and open source machine translation API. It can be downloaded, runs offline and is described as easy to set up, allowing users to run their own API server in a few minutes.
LibreTube is an alternative frontend for YouTube on Android. It is free and open source under GPL-3.0 and does not use Google services or save user data. It supports subscriptions, SponsorBlock and video chapters, and Google account login is not supported.
LibreWolf WinUpdater is a tool intended to make updating LibreWolf for Windows easier. According to the repository, it can be used for installed and portable instances, and a fork exists for Chromium. Its code is mainly AutoHotkey and PowerShell, and documentation and issues have moved to librewolf.dev.
Lichess is a free, open source online chess server. It offers a clean interface requiring no registration, ads or plugins, and allows play against the computer, friends or random opponents. The site also provides server analysis, tournaments, puzzles, studies and a board editor.
Lichess Org is a GitHub repository or organization with source code, releases, documentation, or project resources.
Dataset repository covering communication, with searchable aggregated data.
Browse research datasets and datasets related to geography.
Lidraughts is a free, open source online draughts server. It offers a clean interface requiring no registration, ads or plugins, with play in tournaments, with friends or against random opponents. The site also provides engine analysis, puzzles, studies and support for international draughts and six variants.
The Life Science Database Archive maintains and stores datasets generated by life scientists in Japan for the long term. It lets users search datasets by metadata in a unified format and access and download them under clear terms of use. It also provides datasets in forms suited to different users in public and private institutions.
Search agriculture, forestry and veterinary medicine data collections and supporting aggregated data from ESP.
The Ligand-Gated Ion Channel Database holds nucleic and proteic sequences of ligand-gated ion channel subunits, one entry per gene, manually constructed and checked. It offers multiple sequence alignments, some phylogenetic studies, and atomic coordinates when available. Development began in 1994 and the resource is now officially frozen; the data and links remain but it is not actively maintained or considered up to date.
Lighthouse Reports is a non-profit based in the Netherlands that leads complex transnational investigations. It blends traditional investigative journalism methods such as freedom of information requests with emerging techniques like open source investigation and data science, and works with media partners to publish public interest journalism.
Find and access engineering research data, with indexed datasets.
Find and access basic in biology and medicine research data, with indexed datasets.
LineageOS is a free and open-source operating system for various devices, based on the Android mobile platform. It extends the functionality and lifespan of mobile devices from more than 20 manufacturers and receives monthly security updates on supported devices.
An MIT OpenCourseWare course covering matrix theory and linear algebra, emphasizing topics useful in physics, economics, social sciences, natural sciences and engineering. It is designed for independent study and includes lecture videos by Gilbert Strang, summary notes, problem solving videos, and problem sets with solutions.
Linear Algebra Done Right is a textbook for a second course in linear algebra aimed at undergraduate math majors and graduate students. The fourth edition is an Open Access book under a Creative Commons BY-NC license, available free electronically in English, Chinese, Farsi, Greek, Hebrew, and Portuguese. It contains over 250 new exercises and over 70 new examples, and defers determinants to the end.
Linear Digressions is a podcast series covering machine learning and AI topics, with episodes such as "LLM as a Judge," a cross-post on AI and podcasting from the Harvard Data Science Review, and a benchmark installment on ExploitGym. One episode examines mechanistic interpretability, described as an approach that opens the model itself to trace why it behaves as it does.