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Count Duplicates is a free online JavaScript tool that aggregates pasted lines and shows the count of occurrences of each value. Results include unique values, occurrence counts, the total number of lines and the number of unique values. Output can be copied in TAB or CSV format for spreadsheets. Data is processed client-side in the browser and is not sent or stored elsewhere.
A free browser-based tool for cropping video files, using HTML5 and JavaScript so files are processed locally without upload. Users set the cropping area with the mouse or by entering values and can set start and end times. Output format can be configured, and supported formats include MP4, WEBM, MOV, FLV, MKV and AVI.
CS50 is Harvard University's introduction to computer science and programming, intended for students with or without prior experience. It covers computational thinking, abstraction, algorithms and data structures, and programming in C, then Python, and later SQL, HTML, CSS and JavaScript, ending with a final project. The material is available free online through OpenCourseWare over eleven weeks.
CSS-Tricks Code Snippets is a collection of code snippets for web developers covering HTML, CSS, JavaScript, PHP, WordPress, jQuery and HTAccess. Entries are organized by category and list an author and last updated date.
A guide by cweeper for importing custom 3D models into Minecraft and creating renders in Blender. It lists required tools including Minecraft Java Edition, ObjToSchematic.com, Jmc2Obj, Blender, and the MCprep Blender addon, and covers converting models to Minecraft formats, exporting worlds, and setting up Blender. It notes that a high-end graphics card affects render quality and duration.
D3.js is a JavaScript library for bespoke data visualization developed by Observable. It enables creation of custom dynamic visualizations with features including selections and transitions, scales and axes, shape rendering, interactive behaviors, layout algorithms, and geographic map projections. The library also powers Observable Plot, a high-level visualization API.
An open-source JavaScript visualization library that streamlines the creation of beautiful and accessible SVG data visualizations.
Dash is an open-source Python library for building data applications and dashboards without requiring JavaScript expertise. It is maintained by Plotly and hosted on the company's public GitHub repository, where users can access source code and contribute to the project.
Dash is a free online course from General Assembly that teaches the basics of web development through projects done in the browser. The course covers HTML5, CSS3 and JavaScript, including layout, styled landing pages and dynamic interfaces.
A lightweight framework for data analysis in JavaScript.
Datumbox is an open-source machine learning framework written in Java for rapid development of machine learning and statistical applications. It focuses on including many machine learning algorithms and statistical methods and on handling large datasets. The code is licensed under the Apache License, Version 2.0, and releases are available on Maven Central, including version 0.8.2.
dc.js is a JavaScript charting library with native crossfilter support for exploring large multi-dimensional datasets. It uses d3 to render charts in CSS-friendly SVG format. Charts are data driven and reactive, providing instant feedback to user interaction. The library is described as usable in the browser and on mobile devices.
An online decompiler that accepts uploaded artifacts and converts them back to source code or extracted resources. It supports Java class and archive files, Python bytecode, .NET assemblies, Android packages and Flash files, among other formats.
Devhints is a collection of web development cheatsheets covering topics such as JavaScript, CSS, Git, Docker, and various command line tools. Each sheet is a one-page quick reference with usage examples, links, and snippets. The site also includes guidance on writing cheatsheets and on writing Vim help files.
A powerful JavaScript library for interacting with the Discord API
Discord4J is a fast, powerful, unopinionated, reactive library to enable quick and easy development of Discord bots for Java, Kotlin, and other JVM languages using the official Discord Bot API.
Discreet Launcher is an open-source Android launcher written in Java. It provides a clean home screen while giving access to everything instantly. The project repository was archived by its owner and is now read-only, and the project is no longer maintained. Builds are distributed through F-Droid.
SearXNG is a free internet metasearch engine that aggregates results from up to 261 search services. Its documentation states that users are neither tracked nor profiled, and that SearXNG can be used over Tor. The project began in mid-2021 as a fork of the searx project, and JavaScript and cookies are optional.
DuckDB is an analytical in-process SQL database management system. It is a high-performance analytical database system designed to be fast, reliable, portable and easy to use, with a rich SQL dialect supporting nested correlated subqueries, window functions, collations and complex types. It is available as a standalone CLI application with clients for Python, R, Java and Wasm.
dygraphs is a fast, flexible open source JavaScript charting library that allows users to explore and interpret dense data sets. Charts are interactive, with zoom, pan and mouseover available by default, and the library handles very large data sets. It works in all recent browsers.
e!DAL is a free software infrastructure for maintaining and publishing in-house research data. It offers a submission tool with an embedded review process and ELIXIR AAI login, supporting DOI-citable datasets. It includes index-based metadata search, version tracking, an embedded HTTP(S) server, and a Java-compatible API, and is designed to support JSON-LD, OAI-PMH and ORCID for data harvesting and linkage.
Eaglercraft is a version of Minecraft rebuilt to run in a web browser using JavaScript and WebAssembly. Players can build and survive in singleplayer, join multiplayer servers, or open their own world for others to join. It runs on Chromebooks, phones and other devices with a browser, and supports resource packs.
ELKI is an open source data mining software written in Java. It focuses on research in algorithms, emphasizing unsupervised methods in cluster analysis and outlier detection, and offers data index structures for performance and scalability. It is designed for researchers and students to extend.
EncodeDna.com is a developer resource offering online tools, tutorials, guides and articles on web development topics such as Python, Node.js, JavaScript, Angular, CSS and color theory. Its browser-based tools include an image viewer, HTML minifier, image cropper, color palette generator, JSON validator and notepad. Articles are described as new regularly and free for ever.
