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The SPDX License List is part of the SPDX Specification and lists commonly found licenses and exceptions used in free and open or collaborative software, data, hardware or documentation. Each entry includes a standardized short identifier, full name, license text and a canonical permanent URL. License Exceptions are used with the "WITH" license expression operator.
An online repository of temporal specification patterns gathered from common specifications of concurrent and reactive systems. It provides patterns with descriptions mapping system behavior into precise statements in formal specification languages, and it supports mappings to several formalisms with tool support for automated analysis.
Special K is a GitHub repository or organization with source code, releases, documentation, or project resources.
Dataset repository covering chemistry, with searchable datasets.
Spectral Database for Organic Compounds (SDBS) is a free public database organized by the National Institute of Advanced Industrial Science and Technology (AIST) in Japan. It hosts spectral data for organic compounds, including nuclear magnetic resonance (NMR), mass spectrometry (MS), electron spin resonance (ESR), infrared (IR), and Raman spectra.
Speed Reader is a free web app for speed reading that supports .txt and .epub files. It offers adjustable words-per-minute, pausing, looping and customizable fonts, colors and font size, including OpenDyslexic. Playback is controlled by spacebar, progress bar and step buttons.
SpeedCrunch is a free, open-source high-precision scientific calculator licensed under the GPL. It features a fast, keyboard-driven interface that displays results as users type, with a scrollable input history, customizable syntax highlighting, and an optional on-screen keypad. The calculator supports over 80 built-in mathematical functions, user-defined functions, variables, calculations with up to 50 digits of precision, complex numbers, numeral bases, unit conversions, and includes a library of over 150 scientific constants and common formulas. It is available for Windows, macOS, and Linux in multiple languages.
SpeedRead is a code project with source, releases, documentation, or setup notes.
Speeedy is a code project with source, releases, documentation, or setup notes.
Open-source project that provides machine-learning models, research, training resources, or evaluation tools.
Spinning Up is OpenAI's educational resource on deep reinforcement learning. Its documentation covers installation, included algorithms, running experiments, and an introduction to RL, along with algorithm pages for methods such as DDPG and PPO. The DDPG page describes an algorithm that concurrently learns a Q-function and a policy for continuous action spaces. The PPO page describes on-policy first-order methods, including PPO-Clip.
Research data portal for exploring astrophysics and astronomy records, including observational data.
Splash Protocol is a decentralized trading protocol on Cardano. It offers a Temporal Liquidity Book that builds markets from multiple AMM liquidity pools and an order book, and composable orders executed by an execution engine. The protocol describes decentralized, permissionless automation and open-source smart contracts, plus SPLASH DAO governance through locked SPLASH tokens.
Spliit is a minimalist web application for sharing expenses with friends and family. It offers groups, categories, receipts, advanced splitting by percentage, shares, or amount, balances, and optimized reimbursements. The project is open source and states that no account is required.
splix.io is a browser-based io game in which players compete to conquer as much land as possible. It offers spectator mode, global leaderboards and server selection. The server code was rewritten, and the game is now open source, allowing users to host their own server instance.
SponsorBlock for YT Music is a code project with source, releases, documentation, or setup notes.
Spoo.me is an open-source link management platform with advanced analytics and an API-first core. It provides URL shortening, click analytics, QR codes and custom domains, and is self-hostable. The v1 API offers endpoints for shortening, managing and analyzing URLs, with no registration required to start shortening.
SpoofDPI is a code project with source, releases, documentation, or setup notes.
SpookyGhost is an open source tool by Encelo for creating procedural animations for sprites. It animates properties such as size, rotation, position and color, and allows users to deform sprite shapes. Lua scripts can be written for custom animations, and results can be exported as single frames or a spritesheet. Native versions are available for Windows, macOS, Linux and Android.
Spoqify is a service that accesses Spotify playlists such as Song Radio as an anonymous user. Users replace the t with a q in a Spotify playlist URL or paste the URL into a form, and the service opens the playlist without session cookies, extracts the song IDs, and creates a new playlist with the same songs. It is MIT-licensed and its source code is on GitHub.
Spot C Plus Plus is a code project with source, releases, documentation, or setup notes.
Spot Sponsor Block Extension is a GitHub repository or organization with source code, releases, documentation, or project resources.
Spot Transfer is a GitHub repository or organization with source code, releases, documentation, or project resources.
Spoti Flac Mobile is a code project with source, releases, documentation, or setup notes.
