I wouldn't call the Cryptonite (XCN) project successful. The XCN coins are worthless now (1 coin = 12 satoshi).
XCN was created in 2014, with a lot of innovative functions, and it's still working, being maintained and developed after more than 4 years.
The current price may seem low only because it was pumped by the chinese back in june 2017, up to 3000 sat and 3000 BTC daily volume.
I don't call this unsuccesfull, I call it a solid coin, showing new tech that is working as expected.
Unsuccessful is a coin being dropped by their own devs after a few months, like most of the coins that are created everyday.
XCN is really a worthwhile and quite interesting project, which is supported by a good team and background in the form of hard work for 4 years. I think the project is undervalued.