Are there any other anonymous developers like Satoshi Nakamoto and BCNext that abandoned their project? I'm doing some research on anonymous developers in the crypto currency space. Satoshi Nakamoto was the first to create a crypto currency and then vanish from existence. Another one was BCNext that create the NXT platform and then vanished. 

What other anonymous developers took the same approach?
There is also the CryptoNote creator Nicolas van Saberhagen.

From: https://en.wikipedia.org/wiki/CryptoNote#Controversy_and_criticism:


  The author of the white paper went by the name Nicolas van Saberhagen,
  although like Satoshi Nakamoto (the author of the bitcoin white paper)
  that name is likely a pseudonym. Saberhagen's true identity and
  location remains unknown. Some have claimed that the real creator is
  someone in the bitcoin community.


It gets interesting, because the community found the first CryptoNote (Bytecoin BCN) currency to be a likely scam.
The controversy is regarding the creator himself likely pre-mining the coin in secret before the "official" launch, as well as suspected of having an unfair mining advantage because of publishing a handicapped miner (later fixed by the community).
To give weight to the controversy, seems like the timestamps of the original whitepaper were fabricated as well.

For a longer read, the details have been presented here: https://bitcointalk.org/index.php?topic=740112.0


  tl;dr - CryptoNote developers faked dates in whitepapers. Bytecoin
  faked dates in fake blockchain to facilitate an 82% premine, and
  CryptoNote backed them up.