History of the nomadic fediverse

2010:

• DFRN
• Mistpark/Friendika/Friendica
  (DFRN)

2011:

• Zot
• Free-Friendika
  (DFRN)
  (forked from Friendika)
• several other Friendika forks
  (DFRN)
  (forked from Friendika)
  (discontinued 2011)
• Red/Red Matrix
  (DFRN, from 2012 Zot)
  (forked from Free-Friendika)
  (rebuilt into Hubzilla 2015)

2015:

• Hubzilla
  (Zot, later Zot6)
  (rebuilt from the Red Matrix)

2018:
Zot6

• Osada
  (Zot6)
  (forked from Hubzilla)
  (discontinued in 2018)
• Zap
  (Zot6)
  (forked most likely from Osada, maybe from Hubzilla)
  (discontinued in 2022)
• Osada
  (Zot6)
  (forked from Zap)
  (discontinued in 2019)

2020:
Zot8

• Redmatrix 2020
  (Zot8)
  (forked from either Zap or Mistpark 2020 or (the third) Osada)
  (discontinued in 2022)
• Mistpark 2020 a.k.a. Misty
  (Zot8)
  (forked from either Zap or Redmatrix 2020 or (the third) Osada)
  (discontinued in 2022)
• Osada
  (Zot8)
  (forked from either Zap or Redmatrix 2020 or Mistpark 2020)
  (discontinued in 2022)

2022:

• Nomad
  (originally Zot11)
• Roadhouse
  (Nomad)
  (forked from either Redmatrix 2020 or Mistpark 2020 or (the third) Osada)
  (discontinued in 2022)
• (streams)
  (Nomad)
  (forked from Roadhouse)

2024:
Forte
(ActivityPub)
(forked from (streams))[/list]
So as far as Fediverse server applications go, he created Friendica, Free-Friendika, a few more Friendika forks, the Red Matrix, Hubzilla, three Osadas, Zap, Redmatrix 2020, Mistpark 2020, Roadhouse, (streams) and Forte. Depending on how you want to count them, that's at least 13 or 14 server applications. Four of these are still being maintained (Friendica by a new team, Hubzilla by another new team, (streams) and Forte by himself).

long version