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rentry.org
Sukino-Findings is a comprehensive practical index for setting up free, modern, secure interfaces for AI roleplay. It compiles scattered learning resources from sources including Reddit, Neocities, Discord and Rentry notes, and provides step-by-step guidance for tasks such as selecting an interface, obtaining an AI model, configuring the model, setting up a user persona and operating a roleplay chatbot.
sumatrapdfreader.org
SumatraPDF is a free, open-source PDF, eBook and comic reader for Windows. It supports PDF, EPUB, MOBI, CBZ, DjVu, XPS, CHM and images, and is described as lightweight and fast, with no ads or bundled software. A portable option runs from a USB drive.
sumi.news
sumi.news collects or organizes headlines and links for browsing news from multiple sources.
super-productivity.com
Super Productivity is a free, open-source, privacy-first task manager with built-in time tracking, timeboxing, and focus mode. It works offline with no account required and is available for Windows, macOS, Linux, Android, iOS, and web. Tasks stay on the device by default, with optional sync via Super Sync, WebDAV, or Dropbox, and integrations for GitHub, GitLab, and Jira. All features and platforms are free forever.
supersmashflash.com
Super Smash Flash is a fan-made platform fighter, and the site hosts Super Smash Flash 2. It reports the 20th anniversary of the original Flash game and links to the original's source code on Codeberg.
supercollider.github.io
SuperCollider is a platform for audio synthesis and algorithmic composition, used by musicians, artists and researchers working with sound. It is free and open source software for Windows, MacOS and Linux. Its three main components are scsynth, a real-time audio engine implemented as a server; sclang, an interpreted programming language acting as a client; and scide, an editor for sclang.
supernova.io
Supernova is a design system and knowledge management platform that connects design and code data, including tokens, components and documentation, into one source. It supports multi-brand design systems, page history, realtime collaboration and code automations. Filtered MCP servers give AI agents team-specific knowledge, and MCP analytics show usage by users.
superset.apache.org
Apache Superset is an open-source data exploration and visualization platform. It offers a no-code visualization builder and a SQL IDE, connects to SQL-based databases, and ships with more than 40 pre-installed visualization types. It includes dashboards, a chart builder, SQL Lab and datasets, with a plug-in architecture for custom visualizations.
suppr.wilddata.cn
AI literature search, document translation, and deep-research workspace for researchers.
surge-synthesizer.github.io
Surge XT is an open source hybrid synthesizer originally released in 2005 and previously sold commercially as Surge by Vember Audio. It combines subtractive synthesis with oscillators, filters, a modulation engine and effects, and supports MPE, microtuning and OSC.
suroi.io
Suroi is an open-source 2D battle royale game inspired by surviv.io. The site describes it as a work in progress and notes that a UI overhaul is still being worked on.
suwatte.app
Suwatte is an ad-free reader for manga, comics and novels on iPhone and iPad. Users can install sources, connect servers such as Komga, Kavita, Suwayomi or OPDS, or open their own files, including CBZ, CBR, PDF, EPUB and image folders. It saves progress and downloads chapters for offline reading. Requires iOS 17 or later.
github.com
Suwayomi is a storage, design, or frontend resource for mockups, assets, UI tools, or web search.
svg-edit.github.io
SVGEdit is a fast, web-based, JavaScript-driven open source SVG drawing editor that works in all modern browsers. It was first launched more than 15 years before the provided snapshot, and was later refreshed to resume active development. It can be used directly in browsers, hosted in custom environments, or integrated into other web applications.
svgstud.io
SVGStud.io is an AI-powered SVG generator and editor. It generates SVGs from textual descriptions and optional example images, refines them iteratively, and offers semantic search across a library of 127303 SVGs plus a gallery and in-browser editing. Generated SVGs are licensed under CC-BY-SA 4.0. Inputs are logged and generated SVGs are added to the public library.
biodiversitydata.se
The Swedish Biodiversity Data Infrastructure (SBDI) is a national initiative that aggregates biodiversity data from multiple sources and makes it available and usable online. It also provides analysis tools and hosts events for researchers working with biodiversity data.
jinxiansen.github.io
Open source project implementing a Windows 11 desktop client using SwiftUI, intended to reproduce the Windows 11 desktop experience. It includes launch, lock, login and desktop screens, dark mode, notification and calendar views, launchpad and system views, and a file explorer. Requires macOS 11.0 and SwiftUI 2.0.
syncthing.net
Syncthing is a continuous file synchronization program that synchronizes files between two or more computers in real time. Communication is secured using TLS with perfect forward secrecy, and each device is identified by a cryptographic certificate. The protocol is documented and the source code is available on GitHub. It runs on macOS, Windows, Linux, FreeBSD, Solaris, OpenBSD and other systems, and is configured through a browser interface.
synfig.org
Synfig Studio is a free and open-source 2D animation program for Windows, Linux and macOS, licensed under GNU GPL v3. It is designed for creating film-quality animation using vector and bitmap artwork, and it eliminates the need to create animation frame by frame. It provides vector tweening, 50+ layers and filters, and a bone system for cutout animation.
diptera.org
Systema Dipterorum is a database of names for two-winged insects, or Diptera, covering names proposed for extant and extinct species. Its two main components are the Nomenclator and the References database. It is presented as an authoritative source for dipteran names and a framework for organizing and integrating data about the insects.
github.com
Linux for T2 is a GitHub organization that maintains patches to Linux and associated distributions for Apple T2-based devices. Its repositories include kernel patches, Ubuntu, Fedora, Linux Mint and Arch Linux builds, and drivers.
tablacus.github.io
Tablacus Explorer is a tabbed file manager with add-on support, offered as a portable download that requires no installation. It runs on 32-bit and 64-bit Windows versions from Vista to 11, with multiple language and Unicode support. Columns include total file size and label, and associations, menus, keys and mouse gestures are customizable. The source is open and released under the MIT License.
tagaini.net
Tagaini Jisho is a free, open-source Japanese dictionary and kanji lookup tool for Windows, MacOS X and Linux. It supports searching vocabulary and kanji entries, tagging and personal notes, flashcard-like training, and printing foldable pocket booklets for offline study. It includes stroke order animations for more than 6000 kanji.