The two coins I'm the most excited for are blocknet and mooncoin.
Blocknet is a PoS coin with a 4 million coin supply and 20 million dollar market cap. They have developed a working truly decentralized exchange that facilitates atomic swapping between two currencies. The currencies need to have BIP65 implemented CHECKLOCKSUMVERIFY, and you currently need a synced chain of the two currencies you wish to trade but they are planning to implement SPV in the future which will allow the wallet to handle lightwallets similar to blockchain.info where the synced chain is hosted elsewhere. One you execute the trade you need to pay transaction fees for the currency you are selling and the buyer will pay transaction fees in the currency they are selling, but they must also pay a small fee (0.1% I think) to the nodes who process the order book matching and hashing of the trades denominated in BLOCK. This creates a consistent buy pressure on BLOCK, but with such a low coin supply and 5k block needed to stake for a node (only 750 odd possible) there will likely be very few available on the market thus making the price per BLOCK soar. This will only increase as more volume is traded through their DEX.
Something that's really cool and could be realized through BLOCKNET is the problem of having liquidity locked up in buy and sell orders. Because exchanges need to account for where a coin is in their database, if you have a buy order for 1 ETH at 0.05BTC, you will have that much BTC frozen until the trade is executed. This means you can't use that 0.05BTC to buy something else. With the BLOCKNET DEX it should be much easier to have a list of open buy orders for ETH, DGB, BTS and whichever coin reaches your buy order first is executed and the others can't be if you don't have the balance to fulfil the trade.
This essentially multiples your ability to make money on the market. The arbitration opportunities will be very lucrative at first with any kind of algorithms employed to it, but eventually much of this could happen in the wallet and a internet of blockchains could arise where you could pay for an item for sale in DGB with BTC from your wallet through BLOCKNET's infrastructure. Similar to ARK, but not vaporware. Apparently ARK lifted x-bridge tech.
Mooncoin is currently bouncing between 1 to 2 sats. It has a 300 billion coin supply but 80 billion are hardforked out as the beneficiaries of the cryptsy hack. This means is has a similar coin supply to DOGE. They have an active dev and quite an enthusiastic community. They're currently voting on a new logo which looks heaps better, have just implemented a new algo Lyra2m (which makes it mineable on a shitty CPU), working on MOON EDU, MOON LITE, SMART LIKES, MOONWORD and have been talking with an investment firm about supporting their currency.
None of that is particularly interesting to me, but I think that with the release of some of these features and another bull run the coin will easily see double digit sats again soon. It pumped from 1 sat to 10 sats with 500 BTC volume on bleutrade before getting listed on c-cex and bittrex wants to list but are just having some problems with getting their end to work with the new algo. They're willing to do it if the community and market is there though.
I could easily see this get to 30 sats or so during that next run. I bought 20 million at 1 sat and held when it pumped to 10. I'll start selling off a few million once it gets over 20. Getting in at 1 sat (0.2 btc worth) with that much volume behind it means that every 5 sats you bank 1 bitcoin and there's plenty of people to sell into as there'll be new bagholders created at every sat interval. If you could get in at 2 sats, you could very easily 5x your money by the years end and it also is a great hedge against bitcoin shitting the bed with it simply bouncing between 2 to 3 sats through the turmoil.