SkypeTab-NG is a small application written Russian developer Nikita Tsukanov, which adds tabs in the window of Skype for Linux and combines the window contacts, chat and instant messaging in one. Settings SkypeTab-NG is displayed in the menu of the icon of Skype. Animation icon SkypeTab is displayed as long as the user doesn't read all the messages.
Installation into Linux Mint:
sudo add-apt-repository ppa:keks9n/skypetab sudo apt-get update sudo apt-get install skypetab-ng
On completion of installation remove Skype from the startup and close the application, then start SkypeTab-NG from the menu.