this one looks interesting
Can't say I've ever used them, but looks like they could have some interesting toys. Lately I've been tinkering with Raspberry Pi's. Set up am ARPS RX only I-gate this week. Earlier in fall I had set up an ADS-B receiver, and have been tinkering with that too. Always interested in kits and tinkering around.
I ended up using a signalink but may order one of those vox kits just to try out.
Nam check out a program called YAAC for your pi. It stands for Yet Another APRS Client