I've attached TCPMP Player. Download it and copy the CAB file to your PPC.
Using File Explorer, navigate to where the file is and tap it once. The installation will begin.
You might need additional plugins too. I'll upload it if you need it.
Anti-Vir is a good antivirus program for your PPC but you have to pay for it unless of course you figure out how to get it for free.
SPB Mobile DVD is a good software to convert high res movies to QVGA format.
Well there is a long list of good software. I'll list what in my opinion is must have.
System
1. Resco File Explorer
2. Total Commander (another file explorer which allows you to read the Extended Rom)
3. BatteryStatus Today Screen Plugin (a good, low memory usage plugin that details temperature, speed, free ram and storage memory. It also supports over clocking for OMAP processors)
4. Modaco NoData (to turn off GPRS when you don't need it. This is especially useful if you have the "Always On" registry key enabled or if you are really low on battery)
5. Wisbar Advance (for skinning the Today bar and Softkey bar. It also serves as a Task Management program)
6. Oxios Memory (to free up RAM)
7. Pocket RAR
8. NotifyMe (This activates all kinds of alarms just in case your SD card pops out by mistake. Very Handy App)
9. PPC Pim Backup v2.5 by DotFred (Backup program for SMS, PIM, Email, Appointments, Call Logs, Tasks etc)
10. Task Manager by DotFred (Very advanced features and a definite must have)
11. WM5torage (Activates the USB Mass Storage driver for the SD card so that you can plug-in your PPC to the computer without any drivers and have it recognize the SD Card as a USB Key)
12. AEB Plus (Button Manager so you can reassign the hardware keys with multiple functions. An absolute must have)
13. Safe Advanced (Safe mode for PPC... just incase a today plug-in malfunctions and it won't boot)
Internet
1. Opera v8.65 (slightly heavy on resources but required for websites that don't normally open with IE)
2. PIE Plus v2.2 (most important add-on for IE. This makes IE highly usable and supports tabbed browsing. It is also recommended for browsing most websites since it uses lesser resources compared to Opera)
3. Skype v2.2 Beta
4. Google Maps
5. WinMobile Torrent (PPC Torrent Client)
6. Octro Talk / Shape Services IM+ (Instant Messengers. Octro Supports VOIP for GoogleTalk)
Misc
1. TCPMP with plug-in (Multimedia player including the FLV plug-in)
2. RemoteAmp (Remote control the Winamp on your dektop using your PPC like a wireless remote control. Excellent App)
3. Adobe Acrobat (for ebooks)
4. MS Voice Command v1.6 US (Voice Command and Recognition Services. No need to record tags)