Kernel sysctl MIB-Tree interface

https://gitlab.com/alfix/sysctlinfo

Graphical sysctl MIB explorer

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

C++ classes and macros for describing complex hardware systems

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

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/

Hierarchical pool based memory allocator

http://talloc.samba.org/

Monospaced bitmap font forked from Tamsyn

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

Library that provides thread building blocks (Legacy Version)

https://threadingbuildingblocks.org

Shell wrapper for tclsh (Tcl)

Tool to replay saved packet capture files

http://tcpreplay.synfin.net/trac/

Trivial Database

http://tdb.samba.org/

Trivial Database

https://tdb.samba.org/

Web-based diary system (like weblog) written in Ruby

https://www.tdiary.org/

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

http://scripts.sil.org/TECkit

Templating library for GLib

https://gitlab.gnome.org/GNOME/template-glib

Terminal Description database

https://invisible-island.net/ncurses/ncurses.html

Generate documentation from Terraform modules

https://github.com/terraform-docs/terraform-docs

Terraform provider for gridscale

https://github.com/terraform-providers/terraform-provider-gridscale

Terraform provider for Vultr

https://github.com/squat/terraform-provider-vultr

Tool to switch between different versions of terraform

https://tfswitch.warrensbox.com/

Trained language data for the Tesseract OCR engine

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

Talloc based event loop library

http://www.samba.org/

Path searching library for TeX

Lua library for TeXLive

LuaJIT library for TeXLive

Library for Japanese pTeX and its tools

Tools and library routines for working with TIFF images

http://www.simplesystems.org/libtiff/

Gtk3 timezone map widget, forked from gnome which forked from Ubiquity

https://github.com/dashea/timezonemap

Lightweight freedesktop-compliant panel/taskbar/systray/clock

https://gitlab.com/o9000/tint2

Minimalistic DHCP, UDP proxy, etc server implementations

https://github.com/yurivict/tiny-network-utilities

Small C++ XML Parser

https://leethomason.github.io/tinyxml2/ https://github.com/leethomason/tinyxml2

Shell wrapper for wish (Tk)

C++11/14/17 std::expected with functional-style extensions

https://github.com/TartanLlama/expected

C++ template library for floating point operations

https://shibatch.github.io/tlfloat-doxygen/

C header file only implementation of a typed linked list

https://codeberg.org/dnkl/tllist

Enhanced ftp client from NetBSD

https://ftp.netbsd.org/pub/NetBSD/misc/tnftp/

Enhanced FTP server from NetBSD

https://ftp.netbsd.org/pub/NetBSD/misc/tnftp/

Extended version of tolua, a tool to integrate C/C++ code with Lua

https://github.com/LuaDist/toluapp

Tomcat native library

https://tomcat.apache.org/native-1.3-doc/

Portable fixed precision math library for fast exponentiations

http://libtom.net/

Easy way to make any app work through Tor

https://gitlab.torproject.org/tpo/core/torsocks

Traditional (K&R-style) C preprocessor

https://www.NetBSD.org/~dholland/tradcpp/

Meta-port for Transmission BitTorrent client

http://www.transmissionbt.com/

Transmission BitTorrent client

https://www.transmissionbt.com

Display a tree-view of directories with optional color or HTML output

https://oldmanprogrammer.net/source.php?dir=projects/tree

Incremental parser generator

https://tree-sitter.github.io/

Solver for multi-physics engineering and scientific problems

https://trilinos.github.io/ https://github.com/trilinos/trilinos

Security scanner written in go

https://github.com/aquasecurity/trivy

Advanced, hyperrealistic, multilingual typewriter font

https://copypaste.wtf/TT2020/