Versions

Elliptic curve cryptography, TCP and JSON messages:

Repository:
bitbucket.org/bipedaljoe/ripple-ecc

Symmetric signatures (sha256), UDP+retransmission and binary format messages:

Normal version:
bitbucket.org/bipedaljoe/ripple-normal

Separate user-to-user account into two separate creditors:
bitbucket.org/bipedaljoe/ripple-simple

With user-to-user consensus mechanism "Lockstep":
bitbucket.org/bipedaljoe/ripple