YAML parser and emitter in C++ matching the YAML 1.2 spec

https://github.com/jbeder/yaml-cpp

Package manager for node, alternative to npm (meta port)

https://classic.yarnpkg.com/

Package manager for node, alternative to npm

https://classic.yarnpkg.com/

Package manager for node, alternative to npm

https://classic.yarnpkg.com/

Package manager for node, alternative to npm

https://classic.yarnpkg.com/

Package manager for node, alternative to npm

https://classic.yarnpkg.com/

Package manager for node, alternative to npm

https://classic.yarnpkg.com/

Default GTK theme for Ubuntu

https://github.com/ubuntu/yaru

Default icon theme for Ubuntu

https://github.com/ubuntu/yaru

POSIX-compliant command line shell

https://yash.osdn.jp/index.html.en

Complete rewrite of the NASM assembler

https://yasm.tortall.net/

General-purpose console screen reader

http://yasr.sourceforge.net/

Yet Another LaTeX mode and html mode on Emacs

http://www.yatex.org/

Z39.50/SR client and API library

https://www.indexdata.com/resources/software/yaz/

Diff readability enhancher for color terminals

https://github.com/ymattw/ydiff

Terminal wrapper for creating drop-down consoles

http://phrat.de/yeahtools.html

Minimal X11 window manager with BeOS-like tabbed titles

http://phrat.de/

Help browser for the GNOME 3 desktop

https://www.gnome.org/

Utilities to help manage documentation for Yelp and the web

https://wiki.gnome.org/Apps/Yelp/Tools

DocBook XSLT stylesheets for yelp

https://www.gnome.org/

Free (GPL) encoder and decoder for the yEnc Usenet file format

http://www.yencode.org/

Amateur Radio curses based logging program

https://fkurz.net/ham/yfklog.html

Convert between YAML, TOML, JSON, and HCL

https://github.com/sclevine/yj

Command line tool that converts YAML to JSON

https://github.com/bruceadams/yj

Yubico C client library

https://developers.yubico.com/yubico-c-client/

Library and tool for personalization of Yubico's YubiKey

https://developers.yubico.com/yubikey-personalization/

Command-line YAML and XML processor, jq wrapper for YAML/XML documents

https://github.com/kislyuk/yq

Improved version of Icculus Quake II

https://www.yamagi.org/quake2/

Command-line program for downloading videos from various platforms

https://github.com/yt-dlp/yt-dlp

YouTube downloader written in Go

https://github.com/rylio/ytdl

Unpack data in MS Outlook TNEF format

https://github.com/Yeraze/ytnef

Yubico PIV tool

https://developers.yubico.com/yubico-piv-tool/

Seamless ssh-agent for YubiKeys

https://filippo.io/yubikey-agent

Multi-lingual Unicode text editor with TTF support

https://www.yudit.org/

The Yahoo! JavaScript and CSS Compressor

https://yui.github.io/yuicompressor/

Tool to decode yEnc encoded files

http://yydecode.sf.net/

Fastest JSON library in C

https://github.com/ibireme/yyjson

Compact Finite Element Analysis System

https://en.z88.de/

Zangband (Zelazny Angband) with color, X11 support

http://www.zangband.org/

Maintain and replicate ZFS snapshots

https://github.com/Jehops/zap

The zed attack proxy

https://www.zaproxy.org/

Dynamically typed N-D expression system based on xtensor

https://github.com/xtensor-stack/zarray

Nibbles-like multiplayer game

https://zatacka.sourceforge.net/

Puzzle game where the player has to arrange balls in triplets

https://zaz.sourceforge.net/

ZBar barcode reader

http://zbar.sourceforge.net

Compressed file format that splits the file into independent chunks

https://github.com/zchunk/zchunk

Source port for Doom-engine games

https://www.zdoom.org/

Free RIPv1, RIPv2, OSPFv2, BGP4 route software (server/reflector)

http://www.zebra.org/

Z39.50/SR server software

http://www.indexdata.dk/zebra/

Event logging framework

https://wiki.gnome.org/Projects/Zeitgeist