I ported the ppcoin v0.5.3 client to Qt5.
I did this because it might help [member=30983]peerchemist[/member] to compile it for OSX.
The client seems to compile, run and connect to the network successfully.
However it is not tested in depth, so use at your own risk!
I’ll keep it updated with future ppcoin releases.
I don’t expect this to be merged into the reference client as it is not risk free.
But I’m happy to help if the dev team plans to migrate.