Unicode/MUFI OpenType font for medievalists (Latin, IPA, Runic, Greek)

http://junicode.sourceforge.net/

Regression testing utility for use with the Java(TM) Language

https://www.junit.org/

The editor which sucks less

http://www.mirbsd.org/jupp.htm

Kubernetes command-line tool

https://github.com/derailed/k9s

Makefile framework

https://svn.netlabs.org/kbuild

Free Unicode font for Sinhala script

http://www.kaputa.com/slword/kaputaunicode.htm

Minimal sandboxed CGI library in C

https://kristaps.bsd.lv/kcgi/

Light-weight and easy-to-use password manager

https://keepass.info/

KeePass plugin which facilitates the Kee Firefox plugin

https://www.kee.pm/

Portable scriptable network and serial communication program

https://www.kermitproject.org/

Library for registering keyboard shortcuts

https://github.com/engla/keybinder

Library for registering keyboard shortcuts

https://github.com/engla/keybinder

Extra modules and scripts for CMake

https://quickgit.kde.org/?p=extra-cmake-modules.git

Extra modules and scripts for CMake

https://api.kde.org/frameworks/extra-cmake-modules/html/index.html

Reading, creating, and manipulating file archives

https://api.kde.org/frameworks/karchive/html/index.html

Access to the windowing system

https://api.kde.org/frameworks/kwindowsystem/html/index.html

Khmer OS fonts

https://sourceforge.net/projects/khmer/

802.11 layer2 wireless network detector, sniffer, and IDS

https://www.kismetwireless.net/

Compiler of Keyman KMFL keyboard sources to use with SCIM/IBus

https://kmfl.sourceforge.net/

Example KMS/GBM/EGL application

https://gitlab.freedesktop.org/mesa/kmscube

High performance authoritative-only DNS server

https://www.knot-dns.cz/

High performance authoritative-only DNS server

https://www.knot-dns.cz/

Web application framework for writing web APIs in C

http://www.kore.io/

MIT implementation of RFC 4120 network authentication service

https://web.mit.edu/kerberos/

MIT implementation of RFC 4120 network authentication service

https://web.mit.edu/kerberos/

MIT implementation of RFC 4120 network authentication service

https://web.mit.edu/kerberos/

Development branch of AT&T KornShell 93

http://www.kornshell.com/

Testing framework for infrastructure software

https://github.com/jmmv/kyua/

MP4 muxer and other tools

https://l-smash.github.io/l-smash/

Cracks SAMBA or Windows NT passwords

Icon pack designed to integrate with most desktop environments

https://krourke.org/projects/art/la-capitaine-icon-theme

Linux Audio Developer's Simple Plugin API

https://www.ladspa.org/

Fast MP3 encoder kit

http://lame.sourceforge.net/

Linear Algebra PACKage

https://www.netlib.org/lapack/

Standard C language APIs for LAPACK

https://www.netlib.org/lapack/

Tetris-like game for GNUstep

http://www.nongnu.org/gap/lapispuzzle/

Session management system for JACK audio applications

https://www.nongnu.org/lash/

Library for lossless LAS compression

https://laszip.org/

Image viewer and slideshow application

http://gap.nongnu.org/

LaTeX service for GNUstep

http://www.roard.com/latexservice/

Sans-serif type family

http://www.latofonts.com

Alternative LAZ implementation for C++ and JavaScript

https://github.com/hobu/laz-perf

Microsoft .CABinet file creator

http://ohnopub.net/~ohnobinki/lcab/

Light Color Management System -- a color management library

https://www.littlecms.com/

Accurate, fast, and small-footprint color management engine

https://www.littlecms.com/ https://github.com/mm2/Little-CMS

Linux Test Project GCOV extension

https://ltp.sourceforge.net/coverage/lcov.php

Webfrontend for managing accounts stored in an OpenLDAP server

https://www.ldap-account-manager.org/lamcms/

Maintain DNS zones using an LDAP directory

https://github.com/bklang/ldap2dns

Utility for patching LDAP directories using LDIF files

https://launchpad.net/ldapdiff

LDAP-like embedded database

https://ldb.samba.org/