Tim Koeth – originally built at Rutgers, now at University of Maryland:
http://koethcyclotron.org/
https://koethgroup.umd.edu/cyclotron/
https://www.youtube.com/@nuclearphysicslab
https://www.youtube.com/watch?v=G2N-k5jz8bs
Mark Yuly (Houghton College):
https://www.scribd.com/document/480205902/THE-HOUGHTON-COLLEGE-CYCLOTRON-A-TOOL-FOR-EDUCATING-UNDERGRADUATES
https://dspace.houghton.edu/items/97513cba-fa4d-4228-9deb-7b6a79a5f11e
Simon and Chris Mullins:
https://mullinscyclotron.weebly.com/
Ch. Wolf, M. Frank, E. Held Gymnasium Ernestinum, Coburg, Germany
https://accelconf.web.cern.ch/Cyclotrons2013/papers/we1pb03.pdf
“Cyclotron Kids” (Peter Heuer, Heidi Baumgartner, German Diagama), (possibly never finished):
https://thecyclotronkids.wordpress.com/
Leslie Dewan (possibly never finished):
https://www.youtube.com/watch?v=Yd-i9YU_xZQ
https://www.youtube.com/watch?v=1JmpU5ChaoA
Fred Niell:
http://www.niell.org/ (defunct, wayback archive: https://web.archive.org/web/20200623214009/http://www.niell.org/)
1st cyclotron: https://web.archive.org/web/20200630175247/http://www.niell.org/cyc1.html
2nd cyclotron: https://web.archive.org/web/20200630175252/http://www.niell.org/cyc2.html
Reed Upson, Ray Anchordoquy (still under construction):
https://thecyclotronproject.github.io/
Central High School Cyclotron (possibly never finished):
https://www.repairfaq.org/sam/other/chscyc.htm
Dawson College (possibly still conceptual):
https://www.dawsoncollege.qc.ca/dawson-foundation/projects/engineering-a-mini-cyclotron-crew/