For those who do not wish to buy Mapking Map (routable with GPS function) can rejoice at this news because they can get the map for free.
This free map is actually a joint effort from SLA (Singapore Land Authority). Anyone who has a Windows Mobile 5 or 6 and above can download the map for free. Link to get the free software after the break
You can get the software at the below link.
If you want to know more information, click the below link to SLA website.
Here are two screen shot of the Mapking software. Notice that you can only use two functions.