Yes, but there are more coins with these features. What it's the pipeline in terms of development? Like if you don't stake, what makes Clam worth holding compared to other coins? I am seriously interested in hearing people's opinions. I can't find a lot on the site.
There are some key features that I can point out, First like BayAreaCoins said the method of distribution of Clam, it implemented a method to give out the coins in a way that it can reach most crypto currencies users in a set of very popular (at the time that was take the snapshot) crypto currencies, some can say things like "litecoin sucks" or "doge is joke" but those crypto currencies were chosen because they have some good amount of user that at least tested their waters.
The method is so unique in his kind, that can literally only be done once if it works or at least will need to use the same point as the Clamcoin's blockchain snapshot or prior to avoid gaming in the distribution. Some people can argue that it benefit one more than others, but in general it try to give equal chances to everyone in the distribution, I mean each fund address give equal to everybody, no matter if you have less than 1 btc or have a lot more, you'll get 4.60 per funded address, well people more involved in crypto can usually have more addresses like BTC, LTC or Doge that's how thing goes, some people with "bad practices" like not implemented cold storage can had a disruptive advantage, Clam tries to find the most fair distribution method, no a perfect one.
Contrary to BTC the Proof-of-stake imply that Clam users doesn't need to invest in mining equipment in order to get a share of the staking process, that is a good concern because don't imply equipment that will become obsolete and not able to find another purpose for they and are expensive and waste much electricity, also are hard to setup for the average user.
The coin is deflationary but only by the amount of blocks produced per day at a reason of 1 Clam per staked block contrary to BTC, this promote that users protect the network by staking and receive in exchange a share that in the least case (of staking constantly) is enough to absorb the inflation dilution or in the case of less people staking, gives profit by interest gain. Also depending the point of view, the stake can protect early adopters against the inclusion of new undug Clams in the money supply, I mean there is gonna be dilution but those Clams that have been staking will have an advantage against those recently dug.
In the development part you can find features like the ClamSpeech (that I don't understand well), I think it has a notarization feature, but a feature that was somehow hard to implement because they were trying to find consensus about how to do it was the the
Clamour a kind of consensus tool to make development more decentralized. I'm sure that if you explore what the Clamour is and how it work you can see what others proposals are in the way to be add to the coin and what type of acceptance it has. Also if you have the knowledge you can check the clam github and see how the code goes and i think it also has a place for people check "issues".
There must be some other things that i must be forgotten, like proposals for dynamic fees, no related to the coin directly like loaning Clams for margin trade in site poloniex but this should give you some ideas.