This is a list of notable bulletin board system (BBS) software packages.^[1]

• Citadel – originally written for the CP/M operating system, had many forks for different systems under different names.
• CONFER – CONFER II^{[citation needed]} on the MTS, CONFER U on Unix and CONFER V on VAX/VMS, written by Robert Parnes starting in 1975.
• Mystic BBS – written by James Coyle with versions for Windows/Linux/ARM Linux/OSX. Past versions: MS-DOS and OS/2.
• Synchronet – Windows/Linux/BSD, past versions: MS-DOS and OS/2.
• WWIV – WWIV v5.x is supported on both Windows 7+ 32bit as well as Linux 32bit and 64bit.^[2] Written by Wayne Bell, included WWIVNet. Past versions: MS-DOS and OS/2.

• PicoSpan

• Ami-Express – aka "/X", very popular in the crackers/warez software scene.
• C-Net – aka "Cnet" ^[3]

• Diversi-Dial (DDial) – Chat-room atmosphere supporting up to 7 incoming lines allowing links to other DDial boards.
• GBBS – Applesoft and assembler-based BBS program by Greg Schaeffer.
• GBBS Pro – based on the ACOS or MACOS (modified ACOS) language.
• Net-Works II – by Nick Naimo.
• SBBS – Sonic BBS by Patrick Sonnek.

• Atari Message Information System – and derivatives

• Blue Board – by Martin Sikes.
• C*Base – by Gunther Birznieks, Jerome P. Yoner, and David Weinehall.
• C-Net DS2 – by Jim Selleck.
• Color64 – by Greg Pfountz. ^[4]
• McBBS – by Derek E. McDonald.

• CBBS – The first ever BBS software, written by Ward Christensen.
• Citadel
• RBBS
• TBBS

• Citadel – including Macadel, MacCitadel.
• FirstClass (SoftArc)
• Hermes
• Second Sight
• TeleFinder

• Excalibur BBS
• Maximus
• Mystic BBS

• Citadel – including DragCit, Cit86, TurboCit, Citadel+
• FBB (F6FBB) – packet radio BBS system, still in use.^[5]
• GBBS (Graphics BBS) – used in the Melbourne area.
• GT-Power
• L.S.D. BBS – written by The Slavelord of The Humble Guys (THG).
• The Major BBS
• Maximus
• McBBS – by Derek E. McDonald.
• Opus-CBCS – first written by Wynn Wagner III.
• PCBoard
• PegaSys
• ProBoard BBS – written by Philippe Leybaert (Belgium)
• QuickBBS – written by Adam Hudson, with assistance by Phil Becker.
• RBBS-PC
• RemoteAccess – written by Andrew Milner.
• Renegade – written by Cott Lang until 1997. Currently maintained by T.J. McMillen since 2003.
• RoboBOARD/FX – written by Seth Hamilton.
• Searchlight BBS (SLBBS)
• Spitfire
• SuperBBS – by Aki Antman and Risto Virkkala.
• TBBS
• TCL
• Telegard
• TriBBS
• TAG
• Virtual Advanced – also known as VBBS.
• Waffle – written by Tom Dell, and supported UUCP (and Fidonet through extensions).
• Wildcat! – originally by Mustang Software.
• Worldgroup – The latest version of MajorBBS, the last released by Galacticomm.

• Maximus
• PCBoard
• Virtual Advanced – also known as VBBS.

• Forum 80
• TBBS - by Phil Becker, for the Model III/4

• Citadel – including Citadel/UX, Dave's Own Citadel.
• Falken – Linux versions by Chris Whitacre, past MS-DOS versions written by Herb Rose.
• Firebird BBS – Linux-based.
• LysKOM
• Maple BBS
• Maximus
• PCBoard v16 – formerly by CDC, now by MP Solutions, LLC.
• PicoSpan
• Waffle (BBS software)