Facebook, Quick search for google, blackberry messenger, whatsapp messenger, player for youtube.
BlackBerry Maps is the default app for navigating your way around but there are also other great GPS apps for your blackberry. Some of them include Google Maps and MapQuest Navigator 5.0 all are great for finding your way around.
Some of the most popular and best rated blackberry apps include AP Mobile News 2.5.6 and Flashlight 1.0.2. It all depends on what you are looking for and whether or not you are willing to pay for them.
Its a module that is required by some games and apps on blackberry.
"Most Blackberry apps have a fee to download or use. Some however are free. These can include games, messaging and social media apps as well as safety and weather alerts."
Blackberry app world is currently having a promtion called 'happy birthday blackberry app world' and has apps that have been reduced and even some free ones.
There are two types of Blackberry apps; paid and unpaid, while most apps will cost money, you can always find some good and useful applications for free!
"What is a popular app for a Blackberry depends on the class of the user. However, some of the more popular apps are PeeKa Who, TwitterBerry, YouMail and Viigo."
A Blackberry Playbook can be rooted and Google Tablet Operating System put on side by side or as a total replacement to the blackberry os. Hardware features of 'google tablets' have a wide range, where as there are only two playbooks available. so measure any google tablets vs. the specs of a playbook. Using a playbook 'factory/out of the box' would limit you to 'blackberry app worlds', some android to blackberry apps, and blackberry os which is slowly evolving out of the market. A playbook hardware is a fine device, so running Android OS is not a bad situation to be in, even better would be an HP Touchpad running Android/Google OS
theres some warez sites out there like blackberrywarez.com ...
Not one but there are various famous apps on Google Chrome. Hangouts, Play Music, Google Remote Desktop are some examples.
It is not possible to use iTunes App Store apps on a Blackberry device. Apps from the iTunes App Store are only compatible with Apple's iPhones and iPod Touches. Some developers create versions of their iPhone / iPod Touch apps for other devices (like Blackberry and Android); if there is an app you are interested in, check with the app's developer to see if the app is offered on your platform of choice.