Software:List of public domain projects

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This is a list of public domain projects of software, algorithms, video games, and other digital works that are freely available for use, modification, and distribution without copyright restrictions.

Public domain projects

Compression

• Compressed file library
• LZ77 and LZ78
• XZ Utils

Cryptography

• Advanced Encryption Standard
• BLAKE3
• EdDSA
• Fowler–Noll–Vo hash function
• ISAAC (cipher)
• Poly1305
• Rabbit (cipher)
• Salsa20
• SHA-1
• SHA-2
• SHA-3
• SipHash
• Skein (hash function)
• X25519

Games

• Abuse (video game)
• Android Nim
• Arcade Volleyball
• Ballerburg
• Cart Life
• The Castle Doctrine
• C-evo
• Colossal Cave Adventure
• Coming Out Simulator 2014
• Diamond Trust of London
• Dragonfire (video game)
• Eamon (video game)
• Gloom (video game)
• Golgotha (video game)
• Hamurabi (video game)
• Hunt the Wumpus
• IPPOLIT
• Kiki the nano bot
• The Last Eichhof
• Lemonade Stand
• Miles Sound System
• Mugwump (video game)
• One Hour One Life
• Passage (video game)
• Santa Paravia en Fiumaccio
• Sea Dragon (video game)
• Spacewar!
• Speed Haste
• Star Trader
• Star Trek (1971 video game)
• Stunt Copter
• Trek73

Internet, Protocols, and Communication

• ASCII
• CERN httpd
• TCP/IP
• Qmail
• Ucspi-tcp
• We the People (petitioning system)
• World Wide Web

Numerical / Scientific Software

• Dataplot
• EPANET
• FFTPACK
• GeoTIFF
• LS-DYNA
• Mersenne Twister
• PubChem
• X-13ARIMA-SEATS

Programming languages / Libraries

• BDS C
• Berkeley Yacc
• Basic Linear Algebra Subprograms
• CMU Common Lisp
• CLIPS
• Expect
• JAMA (numerical linear algebra library)
• LaTeXML
• Lemon (parser generator)
• MPICH
• MUMPS
• Netlib
• Otter (theorem prover)
• PForth
• SLATEC
• SLIME
• SQLite
• Steel Bank Common Lisp
• Template Numerical Toolkit

Text Editors / Utilities

• Citadel
• Climm
• CSPro
• Daemontools
• Dbndns
• Djbdns
• Epi Map
• Erwise
• Ezmlm
• Foremost
• HDOS
• Hemlock (text editor)
• High Orbit Ion Cannon
• ImageJ
• Md5deep
• Merlin (assembler)
• Mg (text editor)
• Page Interchange Language
• Pdf-parser
• TempleOS
• Toybox
• Turbo Vision
• Youtube-dl

See also

• Comparison of free and open-source software licenses
• Creative Commons licenses and List of free-content licences
• Copyright status of works by the federal government of the United States
• Copyleft
• List of free and open-source software packages
• List of open-source hardware projects
• Public Domain Day
• Public domain in the United States
• Public-domain software
• Public domain music

Public domain licenses

Creative Commons Public Domain Mark

CC0 license logo

Unlicense logo

WTFPL license logo

• 0BSD — Zero-Clause Berkeley Software Distribution license
• Creative Commons Zero — CCØ
• Do What the Fuck You Want to Public License — WTFPL
• Unlicense