A WIP VM for a programming language that may or may not end up being usable.
Rewrite of RMP with a significant number of fixes, a lot of refactoring, and support for some cool new features, like error correction.
A (mostly?) reliable, connectionless, UDP-based networking protocol.
A Java implementation of Pieter Wiulle's key-prefixed Schnorr Bitcoin Improvement Proposal, with some modifications.