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 BASIC Computer Games 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 Webhttps://cds.cern.ch/record/1164399/
Numerical / Scientific Software Basic Linear Algebra Subprograms Dataplot EPANET FFTPACK GeoTIFF Gridded Surface/Subsurface Hydrologic Analysis JAMA (numerical linear algebra library) LS-DYNA Mersenne Twisterhttps://github.com/ESultanik/mtwister PubChem SLATEC Template Numerical Toolkit X-13ARIMA-SEATS
Programming languages / Libraries
BDS C Berkeley Yacc CMU Common Lisp CLIPS Expect LaTeXML Lemon (parser generator) MPICH MUMPS Netlib Otter (theorem prover) PForth SLIME SQLite Steel Bank Common Lisp TeX
Text Editors / Utilities
Citadel (software) Climm CSPro Daemontools Dbndns Djbdns Epi Map Erwise Ezmlm Foremost (software) HDOS Hemlock (text editor) High Orbit Ion Cannon ImageJ Md5deep Merlin (assembler) 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 licenses 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 Category:Public domain art Public domain music
Public domain licenses
0BSD — Zero-Clause Berkeley Software Distribution license Creative Commons Zero — CCØ Do What the Fuck You Want to Public License — WTFPL Unlicense
References