Today you can download cool messaging app Kik from Nokia Store (Ovi) for free. Kik Messenger is available not only for Nokia Symbian N8, 701, 700, Nokia 603, 500 but for Windows Phone handsets too. This means you cat get it for your new shiny Nokia Lumia 800. Kik is the same cool messenger such as WhatsApp, which already has been available for Symbian Anna and WinPhone 7. With Kik's super easy to use UI you can fast text your friends for free. It has real-time notifications about message status and peer typing. Kik IM also allows you to send media files like photos to your friends.
Hurry up download it from the Nokia Store and the Win Phone Marketplace.