On https://github.com/rotocoin/ I can see only one repository called "rotocoin". I've used it. I can see it's Great Wallet. Although I'd prefer classic version, but nevermind - it's enough for me if it compiles without errors and synces.
Inside the repository you have different branches, 1 with the source for windows I think it's called rotothegreat-win, another call rotocointhegreat( the one with the build-in chat for linux and osx) and master the classic wallet