How do I get apps on my Samsung Solstice via Bluetooth thing on my computer?

I have this little thing that I plug into the computer so I can get things on my phone from the computer and I also have an SD card on my phone that I can put in the computer. I don't have a data plan and internet is restricted for my phone. can someone tell me how to get apps on my phone. I would do anything for at least a couple of apps on my phone.