According to Stellar you can get free stellar coins based on the bitcoins or ripple coins you had in your wallet at a certain date. But how do you claim the stellar coins?
https://www.stellar.org/about/mandate/The writing on that page is in future tense, so that means they haven't done it yet.
We will take a snapshot of the bitcoin blockchain at a particular date and will set up a claim page that will allow bitcoin holders to receive their pro-rata share of the stellars reserved under this program by verifying they control their address from that blockchain snapshot.
It'll probably be the same way that clams did it with you having to import your wallet.dat into the client or something along those lines.