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PyDy, short for Python Dynamics, is a workflow and set of software packages for studying multibody dynamics in Python. Its core is the SymPy mechanics package, which generates symbolic equations of motion for multibody systems, and PyDy extends that output to simulation, analyses, and visualization. It builds on NumPy, SciPy, IPython, matplotlib, Cython, and Theano.
PyStanfordDependencies is a Python interface for converting Penn Treebank trees to Stanford Dependencies and Universal Dependencies. It offers a get_instance() function with subprocess or jpype backends, and convert_tree() or convert_trees() methods returning Token objects. Visualization options include asciitree, Graphviz dotgraphs, and interactive xdot windows. A Stanford CoreNLP or Parser jar file can be supplied, or downloaded automatically.
A GitHub repository containing search plugins used by the search feature in qBittorrent. It serves as a hub for third-party contributors to gather and share plugins and is maintained by community contributors rather than the qBittorrent core team. Python 3 is required since Python 2 support was removed.
QCAD is a professional 2D CAD system with a clean interface and technical drawing tools such as layers, blocks, dimensioning and precision tools. Its core is available under a permissive open source license, and editions include QCAD Community Edition, QCAD Professional and QCAD/CAM.
QuickEmu is a GitHub-hosted open source tool that enables users to quickly create and run optimized virtual machines running Windows, macOS, or Linux. The repository includes documentation covering the project's introduction, core features, and usage instructions.
RAAC is a DeFi lending and borrowing ecosystem backed by real-world assets. It offers two core products: RWf(x), which builds stablecoins backed by commodities, and RAACLend, which facilitates on-chain borrowing against real estate and capital markets via NFTs. Tokenized real estate and gold serve as collateral.
Ray is an AI compute engine consisting of a core distributed runtime and AI libraries for scaling AI and Python applications. It runs on any machine, cluster, cloud provider, and Kubernetes, and is installed with pip install ray.
RIOT is a free image optimizer for Windows, macOS and Linux. It offers automatic image optimization, multi-core batch processing and a live original-versus-optimized preview. The project supports JPEG, PNG, WebP and GIF, and its first public release was in 2008.
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.
SAAYN (Spreadsheets are all you need.ai) is a platform that teaches artificial intelligence topics using familiar spreadsheet tools. It launched with a project implementing the GPT-2 model in Excel to demonstrate that AI concepts can be understood with accessible tools, and its core mission is to make complex AI topics easy to understand without oversimplifying them.
MLOps framework to package, deploy, monitor and manage thousands of production machine learning models.
sheets.works is an educational website that hosts interactive data stories, games and data visualisation projects. Its core series, The Data Drop, publishes free weekly interactive data stories covering pop culture, sports, film, money and internet topics. The site also offers a daily Wordle-style sentence rephrasing game, uplifting news stories, a documentation of Greater Tokyo train station departure melodies, and a visualisation of global Google search trends for helping-related queries.
Sift is a command-line text search tool positioned as an alternative to grep, aiming for speed and flexibility. It is distributed as a single executable with no dependencies for Linux, Windows, OS X and BSD. Features include gitignore support, conditions, multiline matching and multi-core support, with global and local JSON configuration files.
Siril is an astronomical image processing tool. It supports preprocessing steps such as calibration, stacking and enhancement, and tools for analyzing star brightness variation and astrometry. It can process SER videos and FITS cubes, and algorithms run on all computer cores. Versions are offered for Linux, Windows and macOS.
Snorkel is a system for quickly generating training data with weak supervision, released under an Apache-2.0 license and written in Python. The project started at Stanford in 2015 to programmatically label, build, and manage training data. The team now focuses on Snorkel Flow, an end-to-end AI application development platform based on the core ideas behind Snorkel.
Somee.com is a hosting provider offering Virtual Private Servers, Windows hosting for ASP.NET and .NET Core, MS SQL database hosting, shared hosting and mail services. Plans are managed through a control panel, and both free and paid packages are listed.
Sound Show is a soundboard application for live events that plays music, sound effects and ambience, and can send images, video, text, webcams and color backgrounds to a dedicated display. It is available on Windows, macOS, Linux and Android. A free core version exists, with limits on categories and playables per category, and a Pro edition unlocks unlimited categories and advanced features.
SpeedVitals is a website speed testing tool that runs page speed tests from 30 or more locations and devices and measures Core Web Vitals. It also provides a TTFB test, batch analysis of up to 50 tests, performance monitoring with email and Slack alerts, and reports including waterfall charts and resource summaries. The site lists free tools such as an image compressor and an SEO analyzer.
Spike is a simple news aggregator that collects news from around the web every minute. Its sources include BBC News, Hacker News, the r/Reddit Frontpage, Lobsters, Slashdot, The Register, The Onion, WIRED, Core77 and MacRumors.
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.
StarkWare develops STARK proof technology and core technology for the Starknet blockchain. The company states it was founded by co-inventors of STARKs. Its work covers scaling, privacy and quantum-resistant proofs, and the Cairo language for STARK-provable programs and Starknet smart contracts. STRK20 provides shielded balances and private transfers on Starknet.
A neuro-symbolic framework for building applications with LLMs at the core.
TAMBORA is a collaborative research environment for climate and environmental history. It supports work in historical climatology, with a core goal of reconstructing climatic trends from man-made sources. The platform allows users to search and contribute data, and invites experts to apply as reviewers for its publication process. It hosts resources including reconstructed climate data such as temperature fields and historical flood records. TAMBORA is operated by the Albert-Ludwigs-University Freiburg Library and Department of Physical Geography, and the Leibniz Institute for Regional Geography.
TF-GAN is a lightweight library for training and evaluating Generative Adversarial Networks in TensorFlow. It provides core training infrastructure, common GAN operations and normalization techniques, losses and penalties such as the Wasserstein loss and gradient penalty, and standard evaluation metrics including Inception Score, Frechet Distance and Kernel Distance. It can be installed with pip. The repository was archived and is now read-only.
