Semantic search
- Diaspora false
- Server software for the decentralized social network of the same name
- Dino (instant messenger) false
- Modern XMPP Chat Client
- Dircproxy false
- Lets users access one IRC server from many locations
- Dreamwidth false
- A fork of LiveJournal, more recently updated
- Dungeon-mode false
- Create free (as in freedom) RPGs with GNU Emacs. And then play them.
- EF*CK Chat Keyboard false
- Emoji filter / Unicode chat keyboard
- EXo Platform false
- Open source Digital Workplace platform
- Eggdrop false
- IRC bot
- Ejabberd false
- Distributed fault-tolerant XMPP Jabber server
- Ekiga false
- VoIP and video conferencing
- Element Desktop false
- Element (formerly known as Vector and Riot) is a Matrix web client built using the Matrix React SDK
- Empathy false
- a messaging program which supports text, voice, and video chat and file transfers over many different protocols.
- EnergyMech false
- An IRC bot with many features.
- Epicyon false
- ActivityPub server
- Erc false, true
- IRC client for Emacs.
- Ethereal Realms 2 false
- Web-based chat/role-playing system
- Eva false
- KDE based QQ instant messaging client
- Farstream false
- Audio/Video communications framework: Python bindings
- FeedCreator false
- Creates RSS feeds from within PHP
- Feedback Cat false
- WordPress plugin to survey your users and customers.
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