That’s what I’ve found in wiki:
https://en.wikipedia.org/wiki/List_of_cryptocurrencies#Before_2013 . I’ve looked through coins and found out that the chronology of "borning" of first alts is the next one:
- Namecoin (decentralized domain name management, 2011)
- Litecoin (first memory-hard mining, 2011)
- Peercoin (first proof-of-stake mining, created at the end of 2012)
- Ripple (first release in 2012)
- Primecoin (launched on 7 July 2013 by anonymous hacker and Peercoin founder Sunny King
- Gridcoin (created on October 16, 2013 by Rob Halförd.)
- Gogecoin ( introduced by Billy Markus and Jackson Palmer as a "joke" at the end of 2013, in December)
That list is not a fully comprehensive one as Tenebrix,Fairbrix,Geistgeld and Solidcoin all came out in 2011
I mined solidcoin back in the day before the DEV said he was re-branding it to Microcash (which never happened)