There are a few projects to keep an eye on but my top pick would have to be DeepOnion.
For the simple fact that they have been on time with the roadmap and apart from being on time they have included features that weren’t even planned all while still staying on deadline.

Many new advancements are soon coming which will further propel them to the top. (Mobile wallets, stealth addresses, community voting system ‘VoteCentral’..