Adium is probably the most popular third-party chat client.You can connect it to AOL Instant Messenger, Google Talk, Twitter, Mobile Me, IRC, Bonjour, Jabber, plus a few more.Trillian is another popular chat client that brings together many of your messaging apps into one place, including AOL Instant Messenger, Facebook, Google Talk, ICQ, Olark, and Twitter.I much prefer Trillian's interface because it reminds me so much of the built-in Messages app.It's not a Chrome extension and doesn't rely on Chrome to work.
I personally don't like the interface of Adium, but sometimes function is more important than looks.When I signed in, a message pop up asking me to get a new updated version or else I could not continue to use the MSN Messenger.During downloading, another message pop up saying that the is neither compressed ....* SEND A MESSAGE -Skip exchanging phone numbers, just send a message.It's seamless across devices.* SHOW YOUR REACTION - Add a silly sticker, send a dancing GIF and use emojis to express yourself better.* SHARE PHOTOS AND VIDEOS - Capture the moment with the Messenger Camera, add a filter or doodle, then send to friends or share to Stories.* RALLY THE GROUP - Make plans to get together with polls, share your location, split the bill and more.* HOP ON A CALL OR VIDEO CHAT - Hang out anywhere, anytime by getting on call or a group video** chat — filters optional :) **Calls are free over Wi-Fi but otherwise standard data charges apply.* SEND A VOICE MESSAGE - When text just won't cut it, just hit record and send say, sing or shout it out loud.* SEND MONEY SECURELY AND EASILY (within US, UK and France only) - Send and receive money from friends in the app by adding your debit card or Pay Pal* account.