| snapper-gui | Graphical interface for snapper |
| stdoutisatty | Make programs think their stdout is a tty / terminal |
| sticky | Sticky notes app for the Linux desktop |
| supermin | Tool for creating and building supermin appliances |
| solfege | Ear training program |
| scanbd | Scanner button daemon |
| tiny-cuda-nn | Lightning fast C++/CUDA neural network framework |
| smemstat | Memory usage monitoring tool |
| thunar | Xfce file manager |
| sniproxy | Transparent TLS and HTTP layer 4 proxy with SNI support |
| show-midi | Multi-platform GUI application to effortlessly visualize MIDI activity |
| speedtest | Graphical librespeed client written using GTK4 + libadwaita |
| sonic-visualiser | View and analyse contents of music audio files |
| tinycdb | Utility to manipulate constant databases (cdb) |
| sonic-pi | Free live coding synth for everyone originally designed to support computing and music lessons within schools |
| tetgen_1_4 | Quality Tetrahedral Mesh Generator and 3D Delaunay Triangulator |
| sleep-on-lan | Multi-platform process allowing to sleep on LAN a Linux or Windows computer, through wake-on-lan (reversed) magic packets or through HTTP REST requests |
| simutrans | Simulation game in which the player strives to run a successful transport system |
| solarc-gtk-theme | Solarized version of the Arc theme |
| throne | Qt based cross-platform GUI proxy configuration manager |
| slacky | Unofficial Slack desktop client for arm64 Linux |
| tdnf | Tiny Dandified Yum |
| tela-circle-icon-theme | Flat and colorful personality icon theme |
| seturgent | Set an application's urgency hint (or not) |
| sqlitestudio-plugins | Official plugins for SQLiteStudio, a free, open source, multi-platform SQLite database manager |
| sway-launcher-desktop | TUI Application launcher with Desktop Entry support |
| thunar-volman | Thunar extension for automatic management of removable drives and media |
| screenconfig | Automatic configuration of connected screens/monitors |
| target-isns | iSNS client for the Linux LIO iSCSI target |
| timekpr | Manages and restricts user screen time by enforcing time limits |
| srsran | Open-source 4G and 5G software radio suite |
| simpledbus | C++ wrapper for libdbus-1 |
| tayga | Userland stateless NAT64 daemon |
| synthv1 | Old-school 4-oscillator subtractive polyphonic synthesizer with stereo fx |
| sblast | Blast your Linux audio to DLNA receivers |
| sweethome3d.textures-editor | Easily create SH3T files and edit the properties of the texture images it contain |
| swaynotificationcenter | Simple notification daemon with a GUI built for Sway |
| spice-autorandr | Automatically adjust the client window resolution in Linux KVM guests using the SPICE driver |
| taskserver | Server for synchronising Taskwarrior 2 clients |
| solarus | Zelda-like ARPG game engine |
| sequeler | Friendly SQL Client |
| tahoe-lafs | Tahoe-LAFS, a decentralized, fault-tolerant, distributed storage system |
| showmethekey | Show keys you typed on screen |
| setserial | Serial port configuration utility |
| tini | Tiny but valid init for containers |
| sks | Easily deployable & decentralized OpenPGP keyserver |
| swi-prolog-gui | Prolog compiler and interpreter |
| speedscope | Fast and interactive web-based viewer for performance profiles |
| st-snazzy | Snazzy terminal (suckless + beautiful) |
| ser2net | Serial to network connection server |
| seaview | GUI for molecular phylogeny |
| swiften | XMPP library for C++, used by the Swift client |
| signing-party | Collection of several projects relating to OpenPGP |
| singularity-overriden-nixos | |
| thc-ipv6 | IPv6 attack toolkit |
| socalabs-rp2a03 | Socalabs NES Ricoh 2A03 Emulation Plugin |
| tagainijisho | Free, open-source Japanese dictionary and kanji lookup tool |
| stellar-core | Implements the Stellar Consensus Protocol, a federated consensus protocol |
| spectre-meltdown-checker | Spectre & Meltdown vulnerability/mitigation checker for Linux |
| shncpd | Simple, stupid and slow HNCP daemon |
| scmccid | PCSC drivers for linux, for the SCM SCR3310 v2.0 card and others |
| taler-challenger | OAuth 2.0-based authentication service that validates user can receive messages at a certain address |
| tasknc | Ncurses wrapper around taskwarrior |
| semantik | Mind-mapping application for KDE |
| tana | Intelligent all-in-one workspace |
| tanidvr | CLI tool for managing and capturing video from DVRs which use the DVR-IP protocol |
| suricata | Free and open source, mature, fast and robust network threat detection engine |
| snippetexpanderd | Your little expandable text snippet helper daemon |
| soapui | Most Advanced REST & SOAP Testing Tool in the World |
| syspower | Simple power menu/shutdown screen for Hyprland |
| ssl-cert-check | Bourne shell script that can be used to report on expiring SSL certificates |
| snake4 | Game starring a fruit-eating snake |
| taglib-sharp | Library for reading and writing metadata in media files |
| slop | Queries for a selection from the user and prints the region to stdout |
| sqlauncher | Simple QT6 Program Launcher |
| supervise | Minimal unprivileged process supervisor making use of modern Linux features |
| timezonemap | GTK+3 Timezone Map Widget |
| sssd | System Security Services Daemon |
| ssh-tpm-agent | SSH agent with support for TPM sealed keys for public key authentication |
| scorched3d | 3D Clone of the classic Scorched Earth |
| ssw | GNU Spread Sheet Widget |
| swapspace | Dynamic swap manager for Linux |
| syshud | Simple heads up display written in gtkmm 4 |
| sideswap | Cross‑platform, non‑custodial wallet and atomic swap marketplace for the Liquid Network |
| stenc | SCSI Tape Encryption Manager |
| tinycmmc | Tiny CMake Module Collections |
| tangram | Run web apps on your desktop |
| sx | Simple alternative to both xinit and startx for starting a Xorg server |
| smbnetfs | FUSE FS for mounting Samba shares |
| shoreline | Very fast (200+ Gbit/s) pixelflut server written in C with full IPv6 support |
| supermodel | Sega Model 3 Arcade Emulator |
| surf-display | Kiosk browser session manager based on the surf browser |
| slsnif | Serial line sniffer |
| sil | Rogue-like game set in the First Age of Middle-earth |
| slade-unstable | Doom editor |
| sstp | SSTP client for Linux |
| tilda | Gtk based drop down terminal for Linux and Unix |
| service-wrapper | Convenient wrapper for the systemctl commands, borrow from Ubuntu |
| slweb | Static website generator which aims at being simplistic |
| surrealist | Visual management of your SurrealDB database |