.NET Compact Framework 3.5
Many applications you will come across might need the .NET Compact Framework 3.5… it’s therefore probably a good idea if update it right away.

BeyondPod
If you enjoy listening to podcasts, this is a must have app.
It give you the possibility to browse podcast directories, subscribe to podcasts and to downloaded them (one by one or all together).

Google Maps
What can I say… it’s Google Maps :-)
Really great working map software which also does a quite good  job (not even close as good as TomTom or Garmin) in giving you direction.
Don’t forget to enable GPS in the software.

Fring
Fring is a nice multi messenger that combines various protocols/messengers in one software. It’s by far not perfect but I’d say the best choice at the moment. Nimbuzz might be better but it’s far too slow.

Skype
Official Windows Mobile version of skype. Looks great, works great but the downside is, you can’t use it as long as you’re not connected to a wireless connection.

Klaxon
Klaxon is a alarm clock software. It much more convenient as the inbuilt alarm clock and also provides some sweet gimmicks.
Lets say your alarm clock goes of in the morning… you grab the phone and shake it… now you can snooze another 10 minutes… 10 minutes later you turn on the light in the room and the alarm is disabled. You can customize that of course.

Skyfire
Like Opera Mini, Internet Exploere is Skyfire another web browser. Although the resolution of the programm including rendered website is horrible, it provides one thing none of the other browsers have. Flash! Enjoy alle flash website as YouTube.

HTC Tweak
This software provides you with HTC Touch HD setting you cannot access usually.
For instance: You can change the ringing type to “vibrate + increase ring”. which is not available in the standard options.

Facebook
This app is a must have, if you’re one of the millions of Facebook addicts. It keeps you up to date and also saves bandwith since you don’t have to access the website.

FingerSuite
The FingerSuite replaces the standard menu view with a finger friendly and way more attractive alternative. It’s slightly slower (no reason not to use it).

SPB Mobile Shell
This is the first none free app in my post so far… but believe me when I say: It’s worthed every cent.
The SPB Mobile Shell completely replaces the default TouchFlow surface. You can for instance, connect contacts with your contacts on facebook.

Enjoy!