Here is Chat Facebook App version 1.0 for Blackberry 6720/ 6230 World Edition. Download on here by scan this below QR code. 
Pros
- Easy to use
- Displays contacts by group
- Vibration notifications
Cons
- Not very attractive
- Chat window can cut off the end of sentences depending on your screen size
How to scan are follow as:
- · Open the BlackBerry App World app on your BB smartphone.
- · Click the Menu key and select Scan a Barcode.
- · Click Start Scanning. Point your Blackberry smartphone camera at the barcode image (above) and hold the camera steady for 3 seconds to scan it. BlackBerry App World will instantly find the app you’ve selected.
Alternative Download link : CHAT FOR FACEBOOK BB
download from Appworld : chat for fb Lite
Just a simple, intuitive, Facebook-inspired interface centered around the most important task – to let you chat with your Facebook friends. Fast, easy and simple.
Scan the Documents to Go 1.0 “Microsoft “office software QR code below to download the app for Blackberry Bold 9790 Bellagio (onyx 3). Documents To Go was designed and developed with the BlackBerry user in mind. Everything from SureType® to contextual menus to BlackBerry shortcuts are supported for a familiar look and feel. Documents to Go is a suit of software which contains a word processor, spreadsheet, presentation (power point) and PDF viewer. : 
- Open the BlackBerry App World app on your BB smartphone.
- Click the Menu key and select Scan a Barcode.
- Click Start Scanning. Point your Bold 9790 Bellagio (onyx 3) Blackberry smartphone camera at the barcode image and hold the camera steady for 3 seconds to scan it. BlackBerry App World will instantly find the app you’ve selected.
Alternative download link : FREE DOCUMENTS TO GO FOR BLACKBERRY
Download from Blackberry APP World : Document to Go
alternative app : OpenOffice Document Reader
Using the upcoming Documents To Go software from DataViz, users will be able to create Office documents inside their BlackBerry Bold 9790 Bellagio (onyx 3) mobile phone.
Your BlackBerry just have slang cheapest package but want to install your favorite apps? If so, you must install the OTA (over the air) is desired. How to install applications on BlackBerry OTA is a little complicated for those who are not accustomed to.
The first thing to do is you need to download the desired file OTA applications on your PC, then move the file to your BlackBerry device with Desktop Manager for BlackBerry. If so, read the following steps, :
- Open the media application on the BlackBerry, press the left button next to the trackball to open the full menu.
- Click the "Exploration".
- Browse to the location where you want to install the OTA download.
- Once you find the jad and cod file, select the JAD file (should be only one file) and click "open".
Now you will see the details about this file on your Blackberry such as name, version, and vendor. Here you will need to click the "download" at the bottom of the screen.
- Once the application is downloaded, the install process will run, and you can use this application. Wait until all processing is complete, and … BlackBerry apps you want already installed on your BlackBerry smartphone.
- Such tips install applications on BlackBerry OTA we can share.
