SmartImage is a reverse image search tool offered in a Windows GUI version and a cross-platform Rdx version. It queries supported image search engines including SauceNao, IQDB, Ascii2D, trace.moe, and Yandex. Users can input images via direct links, drag-and-drop, clipboard, system context menu, or command line. The tool opens the best matching results in the user's default web browser.
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SmoothDraw is a painting and free-hand drawing program for producing pictures, supporting brushes such as pen, pencil, dry media, airbrush, bristle brush and image hose, along with retouch tools and layers. Downloads are offered as SmoothDraw 4.1.4 Beta for Win 7 SP1 and Win 8/8.1/10 with .NET Framework 4.6, and SmoothDraw 4.0.5 for older Windows versions.
SmoredBoard is a free soundboard and realtime voice changer for Windows. It offers unlimited sound slots, drag-and-drop loading of audio files and a built-in sound editor for trims and cuts. Sounds and voices are stored locally and work offline without an account. A Pro tier is mentioned as offering extra features.
SMPlayer is a free, open-source media player for Windows and Linux that includes built-in codecs for playing audio and video formats without external codec packs. It serves as a graphical interface for MPlayer and mpv, and can play and download YouTube videos, find subtitles, generate thumbnails and resume playback. It is available in more than 30 languages.
SMPlayer is a free media player for Windows and Linux with built-in codecs. It is a graphical user interface for MPlayer and can also play YouTube videos. It remembers the settings of each file played, resuming at the same point with the same audio track, subtitles and volume. It also supports mpv and offers subtitle search and download from opensubtitles.org.
SMTube is a free, open-source YouTube browser for SMPlayer that allows browsing, searching and playing YouTube videos. Videos are played with a media player such as SMPlayer instead of a flash player, which the site states gives better performance, particularly with HD content. On Windows it is distributed as an SMPlayer plugin.
Snap Camera Server Auto Configuration Tool for Windows and macOS.
A Python tool that restores timestamps, location, and captions to exported Snapchat Memories and Chat Media — compatible with Apple Photos and Windows File Explorer.
Snowify is a free, open-source music player with synced lyrics, Spotify import, and cloud sync. It offers synced lyrics sourced from Musixmatch, LrcLib, and Netease, and Spotify playlist import. Windows and macOS builds are available for download, while Android and iOS versions are listed as coming soon.
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.
Somoclu is a massively parallel implementation of self-organizing maps, using multicore CPUs, MPI for cluster workload distribution, and CUDA acceleration. It supports OpenMP, MPI, and CUDA, runs on Linux, macOS, and Windows, and offers planar and toroid maps, rectangular and hexagonal grids, and Gaussian and bubble neighborhood functions. Both dense and sparse input data are supported, with interfaces for Python, R, Julia, and MATLAB.
A fan-made widescreen remaster of Sonic 3 & Knuckles with downloads for Windows, Linux, macOS, Android, and beta versions for iOS and Web. A compatible Sonic 3 & Knuckles ROM is required, and the remastered soundtrack must be downloaded from the game's Options menu.
A free, open-source application for Windows, Linux and Mac that views and analyses the contents of music audio files. It offers configurable visualisation, analysis and annotation of recordings and is aimed at musicologists, archivists and signal-processing researchers.
SooSL is software for making and publishing a sign language dictionary. It works with any sign language and allows videos for signs, example sentences and comments, lookup by handshape, location, motion or gloss, and glosses in written languages. Version 0.9.6 is released for Windows, macOS and Linux.
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.
Source Filmmaker is a movie-making tool built and used by Valve to make movies inside the Source game engine. It uses the same assets as the game, so anything in the game can be used in the movie. It is available for free as a public beta and requires a Windows PC. It includes Team Fortress 2 base game assets and assets from early Meet the Team short films.
Sozo is a free, open-source application for anime, movies, series, manga, light novels and live TV, offered on Android, iOS, Windows, macOS, Linux and Android TV. It gathers content from many sources, includes manga and novel readers with book mode and read-aloud, and supports up to four profiles with a kids mode.
SPARTA is a collection of open-source audio plug-ins for spatial audio production and playback, distributed in VST, VST3, AU, LV2 and AAX formats for MacOS, Linux and Windows. The plug-ins support ambisonic processing up to tenth order, and the binaural decoders can load custom HRTFs via SOFA files and support head-tracking via OSC messages.
SPARTAN is a downloadable pixel art drawing and animation tool for Windows specialised in creating tiles and animated sprites for games. A suite of tools added for Procjam gives it the capability to parametrically generate tileable pixel art tiles, with a visual programming interface for chaining procedural modules.
Speechify is a text to speech and voice typing assistant that reads books, PDFs, documents and web pages aloud with natural-sounding voices. It offers text highlighting, speed control and scan and listen, and is available as browser extensions, desktop apps for Windows and Mac, and mobile apps for iOS and Android.
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.
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.
sshx is a web-based collaborative terminal that lets users share a terminal with others by link on a multiplayer infinite canvas. It offers real-time collaboration with remote cursors and chat, end-to-end encryption, and a lightweight server written in Rust. It is available as a command-line tool for macOS, Linux and Windows.
STARC (Story Architect) is a screenwriting app for Mac, Windows and iPhone that formats scripts and supports planning tools, including a virtual card board and mind maps. It has an AI writing assistant and tools for characters and worldbuilding. A free version is offered, with paid Pro and Creator plans.