The best replacement for prometheus is frankenstein.

The best alternatives to prometheus are rated as following:
★★★★★  frankenstein
★★★★  zeus
★★★★  mayo
★★★  kraken
★★  kayfun
★  miracle barrel
★  openidea
★  madbull
★  gen d3
★  daedalus
★  atlas
  alien movie
  sovereign
  madbull barrel
  victor frankenstein
  snow white
  sobotta
  pdi

Your alternative for prometheus is not listed? Suggest!
Speaking about prometheus, one probably shouldn't forget about m33.

Other search terms related to prometheus and their ratings are:
★★★★★ m33
★★★★ iso tool
★★ alternate ending
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