Tool similar to Gloobus Preview that provides quick file previews

http://www.ubuntugeek.com/gnome-sushi-quick-previewer-for-nautilus.html

X11 font designed to be small yet easily read

http://www.goof.com/pcg/marc/suxus.html

Low level console graphics library

http://www.svgalib.org/

C++ header-only parsers for various SVG syntaxes

http://svgpp.org/

SystemVerilog linter

https://github.com/dalance/svlint

SystemVerilog language server

https://github.com/dalance/svls

Scalable AV1 encoder

https://01.org/svt

Free interior 3D design application

https://www.sweethome3d.com/

Gnome swell-foop

https://wiki.gnome.org/Swell%20Foop

Steve Harris' huge Collection of LADSPA Plugins

http://www.plugin.org.uk

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

http://www.swig.org/

Lightweight image viewer

https://github.com/muennich/sxiv

SymbiYosys (sby): Front-end for Yosys-based formal verification flows

https://yosyshq.readthedocs.io/projects/sby/en/latest/ https://github.com/YosysHQ/sby/

Basic Latin, Greek, Cyrillic and many Symbol blocks of Unicode

http://users.teilar.gr/~g1951d/

Electronic mailing list manager

http://www.sympa.org/

Mouse and keyboard sharing utility

http://synergy-foss.org/

Scriptable database and system performance benchmark

https://github.com/akopytov/sysbench

Helps to install application configuration files

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

Internal sysctl object to implement an improved sysctlbyname(3)

https://gitlab.com/alfix/sysctlbyname-improved/

Kernel sysctl MIB-Tree interface

https://gitlab.com/alfix/sysctlinfo

Graphical sysctl MIB explorer

https://gitlab.com/alfix/sysctlview/

A 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/

C++ classes and macros for describing complex hardware systems

https://www.accellera.org/downloads/standards/systemc

System Preferences application for GNUstep

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

Type 1 font rasterization library for UNIX/X11

Six utilities for manipulating t1 fonts

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

Library for manipulating ID3 tags and Ogg comments

http://taglib.github.com/

Mesh VPN that makes it easy to connect your devices

https://tailscale.com/

Taipei Sans TC

https://sites.google.com/view/jtfoundry/

Gnome tali

https://wiki.gnome.org/Apps/Tali

IRC client for GNUstep

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

Hierarchical pool based memory allocator

http://talloc.samba.org/

Hierarchical pool based memory allocator

http://talloc.samba.org/

Monospaced bitmap font for programming

http://www.fial.com/~scott/tamsyn-font/

Monospaced bitmap font forked from Tamsyn

https://github.com/sunaku/tamzen-font

Online encrypted backup service (client)

http://www.tarsnap.com/

Cross platform GUI for the Tarsnap command line client

https://github.com/Tarsnap/tarsnap-gui/wiki

Library that provides thread building blocks

http://threadingbuildingblocks.org/

Documentation for TCL (Tool Command Language)

https://www.tcl.tk/

Two new channel types for in-memory channels in TCL8

https://memchan.sourceforge.net/

Data conversion, digests, compression, error-correction for Tcl

https://wiki.tcl-lang.org/479

Shell wrapper for tclsh (Tcl)

Tool Command Language

http://www.tcl.tk/

Verbose replacement for getopt

https://tclap.sourceforge.net/

Collection of utility modules for Tcl

http://tcllib.sourceforge.net/

Packet sniffer which displays TCP information like top(1)

http://www.rhythm.cx/~steve/devel/tcptrack/

Set of configuration scripts for the TCSH shell

http://tcshrc.sourceforge.net/

Trivial Database

http://tdb.samba.org/

Trivial Database

https://tdb.samba.org/