My PPC

I have mio 169.

A cheap  nice pocket PC, used basicly for navigation.

Advantages: cost, loud speaker, 400MHz CPU, horizontal screen, GPS Sirf III

Disadvantages: thickness, weight,  battery, Windows Mobile 2003, no WiFi, no BlueTooth

Must Programs:

Bellow some programs I recommend any PPC user to use, I didn't add any description to the programs list, please Google them for more information 

• Total commander
• Spb pocket plus
• PocketBackupPlusSetup2.0 - very important for restoring your  data next time your battery is died
  
• Resco Picture Viewer 4.0
• Packet Earth Map (Navigation)
• Destinator (Navigation)
  
• ChessPPC (Games)
  
• Magic Button
  
• PocketPC2002 divx player
• Somphy Plyaer
  

 Navigation:

Update: I moved to iGO, details here

I use "Distinator 2006" for navigation, I used it in Israel and US and it was very useful.

• For large maps (like US maps) you must have a flash card to store them.
•  Make sure you backup your favorite places so you won't lose them.
  

Except navigation, ppc can be used for music, movies, business small applications and others...

But, personally I didn't find it useful for other things rather than navigation.