XML parser library for GNOME

http://xmlsoft.org/

The XSLT C library for GNOME

http://xmlsoft.org/XSLT/

YAML 1.1 parser and emitter written in C

https://pyyaml.org/wiki/LibYAML

C library for reading, creating, and modifying ZIP archives

https://libzip.org/

Secure, fast, compliant, and flexible Web Server

https://www.lighttpd.net/

Rich city simulation game for X

http://lincity.sourceforge.net/

Lynx-like text WWW browser

http://www.jikos.cz/~mikulas/links/

Linux-PAM offline documentation

http://www.kernel.org/pub/linux/libs/pam/

The Linuxdoc SGML DTD

Linux UPnP Internet Gateway Device

http://linux-igd.sourceforge.net/

List resources in widgets

LIVE.COM Streaming Media

http://www.live555.com/liveMedia/

Command line client for posting LiveJournal entries

https://sourceforge.net/projects/ljclive/

Low Level Virtual Machine

http://llvm.cs.uiuc.edu/

OpenLDAP Lightning Memory-Mapped Database

https://symas.com/lmdb/

Display information gathered from MB power management controller

Create a shadow directory of symbolic links to another directory tree

https://gitlab.freedesktop.org/xorg/util/lndir/

Legacy locale data for FreeBSD 6+

Auditing tool for system logs on Unix boxes

https://salsa.debian.org/debian/logcheck

Receive/Send files via X/Y/ZMODEM protocol. (unrestrictive)

http://www.ohse.de/uwe/software/lrzsz.html

Lists information about open files (similar to fstat(1))

https://github.com/lsof-org/lsof

Small, compilable scripting language providing easy access to C code

https://www.lua.org/

Small, compilable scripting language providing easy access to C code

https://www.lua.org/

Locale and ISO 2022 support for Unicode terminals

https://invisible-island.net/luit/

Non-graphical, text-based World-Wide Web client

https://lynx.invisible-island.net/

Lossless data compressor based on the LZMA algorithm

http://www.nongnu.org/lzip/

Portable speedy, lossless data compression library

http://www.oberhumer.com/opensource/lzo/

Fast file compressor similar to gzip, using the LZO library

http://www.oberhumer.com/opensource/lzop/

GNU M4

https://www.gnu.org/software/m4/m4.html

Bonjour (zero-configuration networking) by Apple

https://developer.apple.com/bonjour/

Apple mDNS responder - BSD nsswitch module

https://developer.apple.com/bonjour/

Magus runtime utilities for build cluster

Dependency generator for makefiles

https://www.x.org/archive/X11R7.5/doc/man/man1/makedepend.1.html

Perl scripts to assist in the generation and application of patches

https://www.vromans.org/johan/software/sw_makepatch.html

Convert man pages to HTML

http://man2web.sourceforge.net/

Wrapper script for the various installations of Maven

Implementation of new/posix awk

http://invisible-island.net/mawk

Motherboard monitor for LM78/79, W8378x, AS99127F, VT82C686 and ADM9240

http://www.nt.phys.kyushu-u.ac.jp/shimizu/download/download.html

Converts CSV to MobileDB database

http://www.handmark.com/products/mobiledbtools/index.html

Alcohol 120% to ISO converter

https://BSDforge.com/projects/sysutils/mdf2iso/

Advertise a service via Rendezvous

https://github.com/Pro/mdnsd/

The wiki engine used by Wikipedia

http://www.mediawiki.org/

High-performance distributed memory object cache system

https://memcached.org/

Utility to test for faulty memory subsystem

http://pyropus.ca/software/memtester/

Stand alone memory test for x86 architecture computers

http://www.memtest86.com/

Menu generator for X Window Managers and desktop environments

http://menumaker.sourceforge.net/

Fast, lightweight source control management system

https://www.mercurial-scm.org/

Small, fast Emacs-like editor

https://github.com/ibara/mg

Easy-to-use library for strong hashes such as MD5 and SHA1

http://mhash.sourceforge.net/

MidnightBSD desktop environment

http://people.midnightbsd.org/~laffer1