I know that google can find them also but here you have list of enigma simulators all on one page (please comment of more that should be added).

Online:

• • http://summersidemakerspace.ca/projects/enigma-machine/
  • https://people.physik.hu-berlin.de/~palloks/js/enigma/enigma-u_v20_en.html
  • http://enigma.louisedade.co.uk/enigma.html
  • http://enigmaco.de/enigma/enigma.html
  • https://cryptii.com/pipes/enigma-machine

Download/other:

• http://wiki.franklinheath.co.uk/index.php/Enigma/Paper_Enigma
• https://www.ciphermachinesandcryptology.com/en/enigmasim.htm

Key generator:

• a online key chart generator that can create unique or reproducible keys is on this site over here
• http://enigma.louisedade.co.uk/dailykeys.html

Physical replicas of different levels of authenticity:

• Arduino enigma: https://www.tindie.com/products/ArduinoEnigma/arduino-enigma-simulator-simulates-enigma-i-m3-and-m4-machines/
• enigma-e, designed back in 2003, sold at bletchley park shop http://www.bletchleypark.org.uk/shop/p.rhtm/130853/795875-Build_your_own_EnigmaE_Kit.html
• a kit based on arduino mega http://www.stgeotronics.com/