1.Evernote
This award winning app lets you remember and recall anything that happens in your life. From notes to ideas to snapshots to recordings, put it all into Evernote and watch as everything instantly synchronizes from your BlackBerry® to the Web to your Mac or Windows
2.Scan to Text
Scan to Text is 2-in-1 mobile scanner for BlackBerry 10. You can either extract the text from the image using optical character recognition technology (OCR) or save you images from the camera or gallery as multi-page PDF file.
3.Shazam
Lovin' that tune?
With Shazam you can discover, buy and share music.
4.Flash Light Free
Flash Light for your device! Incredibly simple and yet very useful flashlight application.use your device's camera as a torch.
5.Photo-Sketch HD
Photo Sketch brings out the artist in you! Photo Sketch converts photos into sketches instantly. Take pictures with amazing pencil sketch effect in real-time or apply Photo Sketch to photos from gallery.
6.Yahoo Messenger
Yahoo!® Messenger for BlackBerry® smartphones allows you to chat in virtual real-time with your instant messaging IM contacts when and where you want to -- not just when you're in front of your computer.
7.Foursquare
Foursquare helps you and your friends make the most of where you are. Join the over 25 million people who are already on Foursquare and download the free app!
8.Google Talk
Google Talk for BlackBerry® smartphones allows you to chat in virtual real time with your instant messaging IM contacts when and where you want to -- not just when you're in front of your computer.
9.Translator – Express Suite
Translator is the most powerful, easiest, professional and SWEET tool for language learner, traveler and normal user, Tested by thousands of users worldwide,\
10.Adobe Reader
Navigation, Zooming & Viewing
• Select single page, continuous scroll or text reflow modes
• Easily zoom in on text or images
Source:appworld.blackberry.com