Extensible Messaging and Presence Protocol Conversations (software) Psi (software) IBM Lotus Sametime Ejabberd Google Talk APEX (messaggistica istantanea) OMEMO Empathy JAJC ICQ Gajim Jitsi Matrix (protocollo) Telepathy (software) Coccinella (disambigua) Emesene (software) Cryptocat IChat Comparazione degli instant messenger Instantbird Fire (instant messenger) Pidgin (software) Psi Messaggistica istantanea Mango (disambigua) Kopete Exodus C6 Multichat Livello di applicazione QuteCom Trillian (software) Identi.ca Calculate Linux Adium Spim Google App Engine Miranda NG Google Hangouts Italian Linux Society AOL Instant Messenger Netstat Erlang (linguaggio di programmazione) Specifica tecnica Sistema d…

di notifica IMessage Splinder GNU social Zabbix DataPortability Curve25519 Standard aperto FreeSWITCH Web service Google Voice Element (software) Windows Live Messenger Chat Linux User Group Server domestico TR-069 Lista di software wiki OS X Mountain Lion Pacchetti GNU Voice over IP WhatsApp Fork (sviluppo software) Licenza libera Beerware Open Source Definition Software proprietario Off-the-Record Messaging Xiph.Org Foundation

Storia del software libero Free and Open Source Software Mach (kernel) Licenza di software libero The Free Software Definition Conferenza Italiana sul Software Libero Open Source Initiative Shared source Linux Foundation Free Software Foundation Latin America Free Software Foundation of India Symbian Foundation Xz (software) Software Freedom Conservancy X.Org Foundation Trusted computing Software libero Porte TCP e UDP standard Revolution OS Eclipse Public License Free Software Foundation Europe Gestione dei diritti digitali GNU Compiler Collection Software Freedom Law Center Jenkins (software) Copyleft Licenza ISC Zlib license Licenza artistica Framasoft OpenSolaris S