There's also this: http://www.gigascale.org/pubs/downloads/octtools/octtools-5.2/ Not sure if this has ever been successfully compiled on x86 linux machines.
Created attachment 203215 [details] First Ebuild. Testing Required. heres an ebuild i made for octtools testing needed on all x86 & amd64 if possible. all the best, Tom Lane
Last release is 7 years old. if there is still a request pleas reopen or drop a message.