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Adium

A free instant messaging application for macOS that can connect to XMPP (Jabber), IRC and more.·adium.im

Adium is a free and open-source instant messaging client for macOS, built on Apple's Cocoa API and the libpurple protocol library. It lets users connect to many different IM services simultaneously from a single contact list, with features like tabbed chats, themeable message windows, OTR encryption, and file transfer. Adium does not host any IM services itself; it is a third-party client for services run by others.

What it's for

Connect to multiple instant messaging accounts and services at onceMaintain a single combined contact list across different IM protocolsChat using tabbed, themeable chat windowsEncrypt conversations using OTRTransfer files with contactsCustomize the client using XtrasIntegrate contacts with the macOS Address Book/Contacts appReceive visual and Growl/Notification Center alerts for IM events

Features 16

Address Book (Contacts) integration
Backing up Adium data
Chat Transcript Viewer
Combined Contacts (merge multiple accounts into one contact)
Email notification for events
File Transfer
Group chat support
Open source codebase
OTR Encryption
Password-protecting Adium
Support for many IM protocols via libpurple (XMPP/Jabber, IRC, AIM, Twitter, and more)
Tabbed chat windows
Themeable WebKit Message View chat windows
Translations into 27 languages
Visual notifications via Growl and macOS Notification Center
Xtras customization system

At a glance

free tieropen source

TypeDesktop app

DeploymentInstalled (local)

PlatformsmacOS

Integrations

TwitterQuicksilverAIMXMPPmacOS Notification CenterIRCGitHubGrowliCalApple Mail

Resources

Docs

Pricing

Adium is free to use; the site solicits donations but states no paid plans.

AdiumFree

Adium is entirely free; the site invites donations to support the project.