Spawns fastcgi applications

http://redmine.lighttpd.net/projects/spawn-fcgi

SPDY protocol version 2, 3 and 3.1 implementation in C

http://tatsuhiro-t.github.io/spdylay/

Common interface to speech synthesis

https://devel.freebsoft.org/speechd

open-source patent-free voice codec

http://www.speex.org/

Audio compression format designed for speech

http://www.speex.org/

Sphinx Full-Text Search Engine

http://sphinxsearch.com/

Standalone JavaScript based from Mozilla 17-esr

http://www.mozilla.org/js/spidermonkey/

Standalone JavaScript (1.8.5) interpreter from Mozilla

http://www.mozilla.org/js/spidermonkey/

Standalone JavaScript based from Mozilla 24-esr

http://www.mozilla.org/js/spidermonkey/

SpiderOak Client (Linux version)

https://spideroak.com/

Tool for statically checking sourcecode for security vulnerabilities

http://www.splint.org/

The Spring Framework for Java

https://www.springframework.org/

Lightweight database abstraction layer

SQL database engine in a C library

https://www.sqlite3.org/

Squeeze is a modern and advanced archive manager

http://squeeze.xfce.org/

HTTP Caching Proxy

http://www.squid-cache.org/

Webmail system which accesses mail over IMAP

http://www.squirrelmail.org/

Protect hosts from brute-force attacks against SSH and other services

https://www.sshguard.net/

Protect hosts from brute force attacks against ssh and other services using ipfilter

http://sshguard.sourceforge.net

Protect hosts from brute force attacks against ssh using ipfw

http://sshguard.sourceforge.net

Protect hosts from brute force attacks against ssh using pf

http://sshguard.sourceforge.net

State Threads Library for Internet Applications

http://state-threads.sourceforge.net/

Library that supports startup notification spec from freedesktop.org

https://www.freedesktop.org/wiki/Software/startup-notification/

Strigi desktop search (meta port)

http://www.vandenoever.info/software/strigi/

Strigi desktop search: Qt4 GUI

http://www.vandenoever.info/software/strigi/

Strigi desktop search: daemon

http://www.vandenoever.info/software/strigi/

Strigi desktop search: utilities

http://www.vandenoever.info/software/strigi/

Advanced IP/IPv6 subnet calculation and discovery

http://www.seccuris.com

Version control system

http://subversion.apache.org/

Version control system

http://subversion.apache.org/

Allow others to run commands as root

https://www.sudo.ws/

Super Tux is a side-scroller similar to Super Mario Brothers

http://supertuxproject.org/

Low level console graphics library

http://www.svgalib.org/

Summarizes and manages differences between local files and Subversion

http://www.incava.org/projects/svndelta/

only pure Java Subversion client library in the world

http://svnkit.com/

Generate wrappers for calling C/C++ code from other languages

http://www.swig.org/

Generate wrappers for calling C/C++ code from other languages

http://www.swig.org/

Mouse and keyboard sharing utility

https://symless.com/synergy

Helps to install application configuration files

http://www.Courier-MTA.org/sysconftool/

Network tool designed for high performance and accurate monitoring

http://puck.nether.net/sysmon/

Backend system admin scripts for gnome-system-tools

http://www.gnome.org/projects/gst/

System Preferences application for GNUstep

http://www.gnustep.org/experience/systempreferences.html

Lossless compression library for scientific data

https://support.hdfgroup.org/doc_resource/SZIP/

Type 1 font rasterization library for Unix/X11

https://www.t1lib.org/

Six utilities for manipulating t1 fonts

https://www.lcdf.org/~eddietwo/type/

Library for manipulating ID3 tags and Ogg comments

http://taglib.github.com/

IRC client for GNUstep

http://gap.nongnu.org/talksoup/

Hierarchical pool based memory allocator

https://talloc.samba.org/

Online encrypted backup service (client)

http://www.tarsnap.com/

Shell wrapper for tclsh (Tcl)