Yahoo! Messenger certainly needs no presentation as it remains one of the most used chat client that comes for free except for a few ads that may interfere time and again on the low side of the main window. It allows on multiple platforms text messaging, photo and document sharing, video and audio calls and free SMS to your friends’ mobiles. IM Conferencing and webcam communication deliver better interactivity and productivity. And talking about productivity, one can’t notice the importance of the contact search bar, the Yahoo! Search bar, the archive and of the voicemail. IMVironments contribute to the personalization of this chat experience.