forallx has been adapted and incorporated into over a dozen custom editions and derivative works. Here is a list of several.
The year listed is the date of the first fork. Many have been revised and have a more recent edition.
- Dave Witte Morris and Joy Morris, University of Lethbridge, Proofs and Concepts: the fundamentals of abstract mathematics (2009)
- J. Robert Loftis, Lorain County Community College, forall x: Lorain County remix and An Open Introduction to Logic (2010)
- Tim Button, University of Cambridge, UK, forall x: Cambridge (2012)
- Nathan Carter, Bentley University, forall x in Lurch (2013)
- [in Spanish] José Ángel Gascón, Universidad Nacional de Educación a Distancia, Spain paratodo x: Una Introducción a la Lógica Formal (2015)
- E.J.R. Elliott, University of Leeds, forall x Leeds (2016)
- Aaron Thomas-Bolduc and Richard Zach, University of Calgary, forall x: Calgary remix (2017)
- Anthony Eagle, University of Adelaide, forall x Adelaide (2017)
- Jonathan Jenkins Ichikawa, University of British Columbia, forall x UBC edition (2017)
- Kathryn Lindeman, Saint Louis University, forall x: SLU (2017)
- Kenneth Winkler, Yale University, forall x: Yale (2019)
- [in Portuguese] Daniel Durante and Maria da Paz Nunes de Medeiros, Para Todxs: Natal (2020)
- [in German] Simon Wimmer, TU Dortmund. Forall x: Dortmund (2020)
- [in Icelandic] Ásgeir Berg Matthíasson, University of Iceland. Fyrir öll x (2022)
- Colin R. Caret, Utrecht University, forall x: Utrecht (2023)