Apps... here is what I have rocking on my 9900 right now:
- Google Maps - you know what this is
- BerryWeather - weather app that puts an icon on your main screen
- MeterBerry - monitor your battery usage, reset your device
- BerryMail - utility for inbox filtering rules
- ScoreMobile - Great sports utility, does alerts too
- Twitter for BlackBerry - Twitter app
- MaraTick - great utility for lists - to do, grocery etc...
- Poynt - utility to find crap near you, businesses, restaurants etc...
- The Weather Network - weather app
- BlackBerry Protect - backup and track your BB - very useful
- TSN Mobile - Sports app
- TD Mobile - Banking App
- Dropbox - File Sharing
- GasBuddy - find cheap gas
- Timmy Me - Tim Horton's app - this should be mandatory
- Wikitude - cool location based browser
- Oanda Currency Converter - no need to explain
- BBM Music - Music sharing utility
- BlackBerry News - News reader
- BlackBerry Travel - Travel management utility
- One Touch Flashlight Free - sometimes you just need a light
- Canoe News - News
- CP24 Traffic Alert - local traffic
- WhatsApp - Cross platform IM app
- Rogers TV Manager - no need to explain
- BerryBuzz - controls your notifications, alerts etc... very very useful
- CaptureIt - screen capture utility
- Photo Editor Ultimate - no need to explain
- Nobex Radio - Streaming Radio
- Vlingo - Voice command utility
- Evernote - neat utility for managing personal tasks etc...
- BlackBerry Mobile Conferencing
Obviously I don't use all of them all the time. My top used ones are:
- Berry Buzz
- Google Maps
As for ringtones, I tend to make my own from MP3s. Google for free ring tones. Lots of crap out there.
Themes can be hit and miss. A badly designed theme can really mess up your phone. I tend to stay away from themes unless they've gotten good reviews.
Here's a screenshot of my 9900's main screen...
The weather icon is BerryWeather, and it has the temp in the notificatoin bar. MeterBerry puts the battery power level in the notifications area as well.
Best thing to do is just get in and poke around. Check out CrackBerry.com for a TON of good how-to info and what not. Very good community in there.
Enjoy your new berry.