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

http://www.swig.org/

Lightweight image viewer

https://github.com/muennich/sxiv

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

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

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/

Gnome tali

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

IRC client for GNUstep

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

Hierarchical pool based memory allocator

https://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/

Shell wrapper for tclsh (Tcl)

Tool Command Language

http://www.tcl.tk/

Collection of utility modules for Tcl

http://tcllib.sourceforge.net/

Tool to replay saved packet capture files

https://github.com/appneta/tcpreplay

Packet sniffer which displays TCP information like top(1)

http://BSDforge.com/projects/net-mgmt/tcptrack/

Set of configuration scripts for the TCSH shell

http://tcshrc.sourceforge.net/

Trivial Database

https://tdb.samba.org/

Trivial Database

http://tdb.samba.org/

Toolkit for converting data between 8-bit legacy encodings and Unicode

http://scripts.sil.org/TECkit

GLib utility library for the Telepathy framework

https://telepathy.freedesktop.org/

Terminus Font - a clean fixed width font

http://terminus-font.sourceforge.net

Terminus Font - a clean fixed width font (TTF version)

http://files.ax86.net/terminus-ttf/

Commercial quality open source OCR engine

https://github.com/tesseract-ocr/tesseract

Trained language data for the Tesseract OCR engine

https://github.com/tesseract-ocr/tessdata

Talloc based event loop library

https://tevent.samba.org/

Basic TeX Engines

https://tug.org/texlive/

Convert a TeX DVI file to PostScript

Formats for basic TeX engines and the latex command

https://tug.org/texlive/

TeX backend for Jade, DSSSL processor for SGML/XML documents

http://jadetex.sourceforge.net/

Path searching library for TeX

Library for Japanese pTeX and its tools

Meta-port that creates a site-local TEXMF directory

TeX implementation translating WEB to C

Non-validating XML parser, written in TeX

Texinfo to HTML converter

http://texi2html.cvshome.org/

Typeset documentation system with multiple format output

https://www.gnu.org/software/texinfo/

TeX Live Typesetting System, base binaries

https://tug.org/texlive/

TeX Live Typesetting System, texmf Tree

https://tug.org/texlive/

TeXLive manager modules

Converts e-mail attachments to plain-text

http://raf.org/textmail/

Tiny/turbo/throttling HTTP server

http://www.acme.com/software/thttpd/