1999 software

macOS (previously OS X and originally Mac OS X) is a proprietary Unix operating system, derived from OPENSTEP for Mach and FreeBSD, which has been marketed and developed by Apple since 2001. It is the current operating system for Apple's line of Mac computers. Within the market of desktop and laptop computers, it is currently the second most widely used desktop OS, after Microsoft Windows and ahead of all Linux distributions, including ChromeOS and SteamOS. , the most recent release of macOS is macOS 26 Tahoe, the 22nd major version of macOS.

GNOME () is a free and open-source desktop environment for Linux and other Unix-like operating systems. It is distributed as the default desktop environment of many major Linux distributions, including Debian, Fedora Linux, Ubuntu, Red Hat Enterprise Linux, and SUSE Linux Enterprise, and is the default in Oracle Solaris, a Unix operating system.

personal computer operating system by Microsoft

personal computer operating system by Microsoft

deprecated instant messaging client

7-Zip is a free and open-source file archiver, a utility used to place groups of files within compressed containers known as "archives". It is developed by Igor Pavlov and was first released in 1999. 7-Zip has its own archive format called 7z introduced in 2001, but can read and write several others.

desktop publishing application

complete implementation of the OpenPGP and S/MIME standards

WebKit is a browser engine primarily used in Apple's Safari web browser, as well as all web browsers on iOS and iPadOS. WebKit is also used by the PlayStation consoles starting with the PS3, the Tizen mobile operating systems, the Amazon Kindle e-book reader, Nintendo consoles starting with the 3DS Internet Browser, GNOME Web, and the discontinued BlackBerry Browser.

Napster was an American proprietary peer-to-peer (P2P) file sharing application primarily associated with digital audio file distribution. Founded by Shawn Fanning and Sean Parker, the platform launched on June 1, 1999. Audio shared on the service was typically encoded in the MP3 format. As the software became popular, the company encountered legal difficulties over copyright infringement. Napster shut down in 2001 following a series of lawsuits and subsequently filed for bankruptcy in June 2002.

iLife is a discontinued software suite for macOS and iOS developed by Apple. It consists of various programs for media creation, organization, editing and publishing. At various times, it included: iTunes, iMovie, iPhoto, iDVD, iWeb, and GarageBand. Only iMovie and GarageBand remain and are now freely available on Apple's Mac App Store. iDVD and iWeb have been discontinued while iTunes and iPhoto have been succeeded by Music and Photos respectively.

XChat (originally styled X-Chat) is an Internet Relay Chat client. It has a tabbed document interface or tree interface, support for multiple servers, and numerous configuration options.

GameMaker (originally Animo, Game Maker (until 2011) and GameMaker Studio) is a series of cross-platform game engines created by Mark Overmars in 1999 and developed by YoYo Games since 2007. The latest iteration of GameMaker was released in 2022.

KDevelop is a free and open-source integrated development environment (IDE) for Unix-like computer operating systems and Windows. It provides editing, navigation and debugging features for several programming languages, and integration with build automation and version-control systems, using a plugin-based architecture.

free cross-platform IDE for Free Pascal

small, user-friendly console text editor

open source software implementing a private branch exchange for various Voice over IP protocols

operating system

KHTML is a discontinued browser engine that was developed by the KDE project. It originated as the engine of the Konqueror browser in the late 1990s, but active development ceased in 2016. It was officially discontinued in 2023.

Dillo is a minimalistic web browser particularly intended for older or slower computers and embedded systems. It supports only plain HTML/XHTML (with CSS rendering) and images over HTTP and HTTPS; scripting is ignored entirely. Current versions of Dillo can run on Linux, BSD, macOS, IRIX and Cygwin. Due to its small size, it is a popular choice for lightweight Linux distributions. Dillo is free software, released under the GNU GPL-3.0-or-later.

non-linear video editing app

Irssi ( ) is an Internet Relay Chat (IRC) client program for Linux, FreeBSD, macOS and Microsoft Windows. It was originally written by Timo Sirainen, and released under the terms of the GNU GPL-2.0-or-later in January 1999.

Java library for full-text search

CUPS (formerly an acronym for Common UNIX Printing System) is a modular printing system for Unix-like computer operating systems which allows a computer to act as a print server. A computer running CUPS is a host that can accept print jobs from client computers, process them, and send them to the appropriate printer.

web browser

UseModWiki is a wiki software written in Perl and licensed under the GNU General Public License. Pages in UseModWiki are stored in ordinary files, not in a relational database. Wikipedias in English and many other languages were powered by UseModWiki until switching to MediaWiki.

3D mechanical CAD design software

Pango (stylized as Παν語) is a text (i.e. glyph) layout engine library which works with the HarfBuzz shaping engine for displaying multi-language text.

Maxon ZBrush is a digital sculpting tool that combines 3D/2.5D modeling, texturing and painting. It uses a proprietary "pixol" technology which stores lighting, color, material, orientation and depth information for the points making up all objects on the screen. ZBrush shares some similarities with traditional sculpting.

Nagios () is an open-source network and infrastructure monitoring system. It monitors hosts, services, and network devices, sending alerts when components fail and again when they recover. Originally written by Ethan Galstad in 1999 as NetSaint, it was renamed Nagios in 2002 after a trademark dispute. The name is a recursive acronym: "Nagios Ain't Gonna Insist On Sainthood."

DC++ is a free and open-source, peer-to-peer file-sharing client that can be used for connecting to the Direct Connect network or to the ADC protocol. It is developed primarily by Jacek Sieka, nicknamed arnetheduck.

Fraps (derived from Frames per second) is a benchmarking, screen capture and screen recording utility for Windows developed by Beepa. It can capture from software that uses DirectX and OpenGL, such as PC games.

2D fighting video game engine

REDIRECT Lavasoft#Adaware antivirus

audio compression format optimized for speech coding

PHP scripting engine

operating system

thumb|RRDtool has a graph function, which presents data from an RRD in a customizable graphical format.

right|thumb|A fragment of the DeCSS code, which can be used by a computer to circumvent a DVD's copy protection.

office suite by Microsoft

mailing list manager

BonziBuddy ( or , stylized as BonziBUDDY) is a discontinued freeware desktop virtual assistant created by Joe and Jay Bonzi. Upon a user's choice, it would share jokes and facts, manage downloads, sing songs and talk, among other functions.

professional word processor made by Adobe Systems

game engine developed by id Software

web browser of Microsoft

cowsay is a program that generates ASCII art pictures of a cow with a message. It can also generate pictures using pre-made images of other animals, such as Tux the Penguin, the Linux mascot. It is written in Perl. There is also a related program called , with cows with thought bubbles rather than speech bubbles. .cow files for cowsay exist which are able to produce different variants of cows, with different kinds of eyes, and so forth. It is sometimes used on IRC, desktop screenshots, and in software documentation. It is more or less a joke within hacker culture, but has been around long enou

Icecast is a streaming media project released as free software maintained by the Xiph.Org Foundation. It also refers specifically to the server program which is part of the project. Icecast was created in December 1998/January 1999 by Jack Moffitt and Barath Raghavan to provide an open-source audio streaming server that anyone could modify, use, and tinker with. Version 2, a ground-up rewrite aimed at multi-format support (initially targeting Ogg Vorbis) and scalability, was started in 2001 and released in January 2004.

operating system developed by Apple

iCab is a web browser for MacOS and Classic Mac OS by Alexander Clauss, derived from Crystal Atari Browser (CAB) for Atari TOS compatible computers. It was one of the few browsers still updated for the classic Mac OS prior to that version being discontinued after version 3.0.5 in 2008; Classilla was the last browser that was maintained for that OS but it was discontinued in 2021.

BlueJ is an integrated development environment (IDE) for the Java programming language, developed mainly for educational purposes, but also suitable for small-scale software development. It runs with the help of Java Development Kit (JDK).

mapping software

multi-platform emulator for mainframe software

SquirrelMail is an open-source webmail application written in PHP. It provides a web-based interface for accessing email via the IMAP protocol and sends messages through SMTP. The project also includes a separate IMAP proxy server written in C. Both components are released under the GNU General Public License version 2 or later.

interactive sky atlas

Video compression format

freeware program

Screen reader for Microsoft Windows

password management system in macOS

ArgoUML is an UML diagramming application written in Java and released under the open source Eclipse Public License. By virtue of being a Java application, it is available on any platform supported by Java SE.

Centericq is a text mode menu- and window-driven instant messaging interface that supports the ICQ, Yahoo!, AIM, MSN, IRC, XMPP, LiveJournal, and Gadu-Gadu protocols.