Apple Public Source License

APSLApple Public SourceAPSL 2.0
The Apple Public Source License (APSL) is the open-source and free software license under which Apple's Darwin operating system was released.wikipedia
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Darwin (operating system)

DarwinDarwin operating systemOpenDarwin
The Apple Public Source License (APSL) is the open-source and free software license under which Apple's Darwin operating system was released.
In 2000, the core operating system components of Mac OS X were released as open-source software under the Apple Public Source License (APSL) as Darwin; the higher-level components, such as the Cocoa and Carbon frameworks, remained closed-source.

Free software license

free software licencefree softwarefree software licenses
The Apple Public Source License (APSL) is the open-source and free software license under which Apple's Darwin operating system was released.
As an example, the Apple Public Source License may terminate a user's rights if said user embarks on litigation proceedings against them due to patent litigation.

Open-source license

open sourceopen-sourceopen source license
The Apple Public Source License (APSL) is the open-source and free software license under which Apple's Darwin operating system was released.

Apple Inc.

AppleApple ComputerApple Inc
The Apple Public Source License (APSL) is the open-source and free software license under which Apple's Darwin operating system was released.

Operating system

operating systemsOScomputer operating system
The Apple Public Source License (APSL) is the open-source and free software license under which Apple's Darwin operating system was released.

Open Source Initiative

OSIOpen Source Initiative (OSI)Open Source software
The first version of the Apple Public Source License was approved by the Open Source Initiative (OSI).

Free Software Foundation

FSFRespects Your FreedomHigh Priority Free Software Projects
Version 2.0, released July 29, 2003, is also approved as a free software license by the Free Software Foundation (FSF) which finds it acceptable for developers to work on projects that are already covered by this license.

Copyleft

copyleft licenseweak copyleftSoftware hoarding
However, the FSF recommends that developers should not release new projects under this license, because the partial copyleft is not compatible with the GNU General Public License and allows linking with files released entirely as proprietary software.

GNU General Public License

GPLGNU GPLGPLv2
However, the FSF recommends that developers should not release new projects under this license, because the partial copyleft is not compatible with the GNU General Public License and allows linking with files released entirely as proprietary software.

Proprietary software

ProprietaryClosed sourceclosed-source
However, the FSF recommends that developers should not release new projects under this license, because the partial copyleft is not compatible with the GNU General Public License and allows linking with files released entirely as proprietary software.

GNU Affero General Public License

AGPLv3AGPLGNU AGPL
The license does require that if any derivatives of the original source are released externally, their source should be made available; the Free Software Foundation compares this requirement to a similar one in its own GNU Affero General Public License.

Software relicensing

relicensedrelicensere-license
Many software releases from Apple have now been relicensed under the more liberal Apache License, such as the Bonjour Zeroconf stack.

Apache License

Apache License 2.0Apache 2.0Apache
Many software releases from Apple have now been relicensed under the more liberal Apache License, such as the Bonjour Zeroconf stack.

Bonjour (software)

BonjourApple BonjourBonjour Browser
Many software releases from Apple have now been relicensed under the more liberal Apache License, such as the Bonjour Zeroconf stack.

Zero-configuration networking

ZeroconfZero configuration networkingDNS-SD
Many software releases from Apple have now been relicensed under the more liberal Apache License, such as the Bonjour Zeroconf stack.

Permissive software license

permissivepermissive licensepermissive free software license
Examples include the GNU All-permissive License, MIT License, BSD licenses, Apple Public Source License and Apache license.

HeaderDoc

Apple's HeaderDoc project is free, open source software distributed under the Apple Public Source License.

BootX (Apple)

BootX
The program is freely available as part of the Darwin operating system under the open-source Apple Public Source License.