SAPO Messenger for Mac is a free Jabber/XMPP client for the Mac OS X platform, developed at SAPO and released under a GNU GPL2 license.
Major features include:
XMPP-compliant client, based on the robust Psi core;
clean Mac OS X experience;
multi-contact support;
WebKit-based chat windows;
Standards-based file transfer;
Uniform roster across multiple accounts, with filtering search of contacts;
Message center to manage offline messages and headline-type messages;
Support for MSN transport on any account;
SMS integration (requires SAPO account);
Growl support;
Sparkle-based updates.
