Similar to Alien_(ソフトウェア)

Scribes (software)

Scribus

Simple DirectMedia Layer

Seasar

Slony-I

Slrn

Software Freedom Law Center

Sound Juicer

SpatiaLite

Firefox#Advertising

SquirrelMail

Stand-alone shell

StumpWM

Sugar (desktop environment)

Sugar Labs

SuperKaramba

Swfdec

Syllable Desktop

Synaptic (software)

Tcl

Tcsh

Ted (word processor)

Template Toolkit

TeTeX

Tk (software)