Orkut open social applications (apps) are finally went live in India today and will follow other users in the next few weeks. You may not see immediately these apps as they are rolling out slowly to users. You will see a “Apps” menu in your profile sidebar if these are enabled for you from there you can add up to 25 apps to your profile.
Your friends can see what apps you added to you profile and can interact with these apps, if they like those you added they can easily add them to their own profile. Apps range anything from games, music, travel to books.
See the below video to get an idea bout what these apps and how to use them.