Similar to Yarn_(パッケージ管理ツール)

Scribes (software)

Scribus

Seasar

Slony-I

Slrn

Software Freedom Law Center

Software in the Public Interest

Sound Juicer

SpatiaLite

Firefox#Advertising

SquirrelMail

Stand-alone shell

Strace

StumpWM

Sugar (desktop environment)

Sugar Labs

SuperKaramba

Swfdec

Syllable Desktop

System.map

Tcl

Tcsh

Ted (word processor)

Template Toolkit

TeTeX