Most Android tablet devices come with their own, limited, app stores rather than the Google Marketplace. The easiest way around this is to install the apps you want manually – these are .APK files.
Other than using Google and searching for each individually, there are a number of sites which allow you to download APK files. The most popular include AndAppStore, AndroidFreeware.org, Androlib, Brothersoft, Freeware Lovers, Get Jar and SlideME.
In many cases they will ask you to select your phone – tablets aren’t normally included, so I’d just select something such as an HTC Hero.
Now, if you also have an Android phone then an alternative method is to…
- Install the app first from the Android Marketplace to your phone
- Backup your apps to SD card using a tool such as Astro File Manager or MyBackup Pro
- Connect your phone to your PC and browse to the backup folder on the SD card
- Within here, you should find APKs for all your backed-up apps. Copy these to your tablet