The open-source OS Haiku is designed to start up where BeOS left off.

Apple has an open-source framework for developing drivers on Mac OS X called the I / O Kit.

* I / O Kit – an open-source framework from Apple for developing Mac OS X device drivers

Currently Mac OS X programmers can choose between limited IDEs, including native IDEs like Xcode, older IDEs like CodeWarrior, newer IDEs like MyEclipse, and open-source tools, such as Eclipse and Netbeans.

* Sequel Pro-a free, open-source front end for Mac OS X.

TPlus is an open-source implementation of original ( non-OO ) Turing with systems programming extensions developed at the University of Toronto and ported to Linux, Solaris and Mac OS X at Queen's University in the late 1990s.

As of 2008, there are more than 50, 000 third-party applications available for the Palm OS platform, which have various licensing types, including open-source, and various closed licensing schemes such as freeware, shareware, and traditional pay-up-front purchase.

In 2000, Rhapsody was forked into Darwin and released as open-source software under the Apple Public Source License ( APSL ), and components from Darwin are present in Mac OS X today.

For example, Mozilla Firefox, an open-source web browser, is available on Microsoft Windows, Mac OS X ( both PowerPC and x86 through something Apple calls a Universal binary ), and Linux on multiple computer architectures.

* Pixen is free, open-source, and available for Mac OS X.

* ASEPRITE is free, open-source and available for Windows, Mac OS X and Linux.

The Fink project is an effort to port and package open-source Unix programs to Mac OS X. Fink uses dpkg and APT ( Debian's package management system ), as well as its own frontend program, ( which is implemented as a set of Perl modules ).

* Audacity is a free and open-source digital audio editor that can run on Mac OS X, Microsoft Windows, and Linux ; it is particularly popular in the podcast community, and also has a large following among the visually impaired due to its keyboard interface.

* Q ( emulator ), open-source x86 emulator for Mac OS X

A long-standing third-party commercial alternative named Resorcerer remains available, and more recently there have been a number of attempts to build open-source Mac OS X-native resource editors, including one called ResKnife.

* Excalibur ( software ), an open-source, LaTeX-aware, spell-checker for Mac OS X

* WW2D was a cross-platform, free and open-source application based on Java and OpenGL technologies and can be run on Microsoft Windows, Mac OS X, Linux ( x86 and x86-64 ) and Solaris on SPARC.

In 2001, under severe financial pressure due to too much leverage, BSDI sold its software business unit ( comprising BSD / OS, plus the former Walnut Creek involvement in the FreeBSD and Slackware Linux open-source projects ) to Wind River Systems and renamed the remainder iXsystems, with plans to specialize in hardware.

An open-source project called Pentagram aims to create an engine capable of running Ultima VIII on modern operating systems, most notably Windows, Mac OS X and Linux.

Tomboy is a free and open-source desktop notetaking application written for Unix-like ( including Mac OS X and Linux ) and Microsoft Windows operating systems, written in C # using Gtk #.

AAT font features are supported on Mac OS 8. 5 and above, including OS X and also on several open-source operating systems such as Linux via IBM's ICU library.

On June 11, 2005, version 0. 1 was released, with all proprietary technology replaced by free and open-source alternatives, with the result that the game now runs on GNU / Linux, Mac OS X and Windows.

Colloquy is an open-source IRC, SILC, ICB and XMPP client for Mac OS X. Colloquy uses its own core, known as Chat Core, although in the past it used Irssi as its IRC protocol engine.

An open-source port of the XNU kernel exists which supports Darwin on Intel and AMD x86 platforms not officially supported by Apple, although it does not appear to have been updated since 2009.

* Atlas is a free ( open-source ) port of the pfstmo tone mapping operators to Adobe After Effects

With its roots in market research, ' competitive intelligence ' has been described as the ' application of principles and practices from military and national intelligence to the domain of global business '; it is the business equivalent of open-source intelligence.

The AMAS has attempted to negotiate solutions with video game companies, arguing that an open-source or reasonably priced alternative would emerge from an unfavorable situation.

Lately, it has focused on smartphones using Google's open-source Android mobile operating system.

Free software and open-source are two similar categories of software licensing but which criteria of inclusion has open source including a few more licenses than is allowed under the free software definition.

Red Hat has become associated to a large extent with its enterprise operating system Red Hat Enterprise Linux and with the acquisition of open-source enterprise middleware vendor JBoss.

The compiler ( called Zilch ) which Infocom used to produce its story files, has never been released, although documentation of the language used ( called ZIL, for Zork Implementation Language ) still exists and an open-source replacement ( called ZILF ) has been written.

Also, a free open-source physics library for 3D deformable object simulation Vega FEM has been named after Jurij Vega.

Once a popular open-source Linux audio player, it has now been largely surpassed by newcomers such as Audacious, Amarok, Exaile, Banshee and ( more recently ) Songbird.

In some posts there, he has expressed his opinion on open-source software, including open source implementations of Lisp and Scheme, as something that should be judged individually on its essential merits, rather than automatically considered good merely by the fact of being free or open.

* Open source: Streaming media company RealNetworks has announced that it will support the free software Ogg Vorbis audio compression technology as part of its new open-source initiative.

More recently, an open-source version has been developed for GNU / Linux.

The open-source culture has penetrated the smartphone market in several ways.

While similar technologies existed ( Wabi for Solaris and Linux, FX! 32 for Alpha and IA-32 EL for Itanium, open-source DAISY, the Mac 68K emulator for the PowerPC ) in the 1990s, the Transmeta approach has set a much higher bar for compatibility — able to execute all x86 instructions from initial boot up to the latest multimedia instructions — while retaining most of its core performance.

The interstage and the secondary are encased together inside a stainless steel membrane to form the canned subassembly ( CSA ), an arrangement which has never been depicted in any open-source drawing.

Netflix has consistently shown reluctance to support customers using Linux and other open-source operating systems.

The Perseus Project supports open-source content and has published code on SourceForge.

The model started to shift, however, in 2006 and since the XML standard Microsoft has been earning a better reputation within the open-source and open-standards community.

The Open Source Initiative ( OSI ) has certified it as an open-source license, but the Debian project judged version 1. 1 to be incompatible with the DFSG.

A report by the Standish Group states that adoption of open-source software models has resulted in savings of about $ 60 billion per year to consumers.

DC ++ itself has several specialized spin-off open-source versions as well, such as BCDC ++ and StrongDC ++, which are refined with features particular to user groups, such as filters, language packs, and search capabilities.

The Yellowdog Updater, Modified ( YUM ) is an open-source command-line package-management utility for RPM-compatible Linux operating systems and has been released under the GNU General Public License.

Although most open-source drivers were written before this, it has helped to solve compatibility issues.

MediaWiki development has generally favored the use of open-source media formats.