Tom Schmidt has had a real go at getting all the pieces of Papias together, including all the Greek, Latin, Armenian and Arabic pieces, and getting people to make translations. The whole lot is here. His notes by each fragment are also very useful, particularly in the case of the more obscure fragments. I think this must be the definitive collection for now. Well done Tom! The excellent Robert Bedrosian helped out with the Armenian.
A suggestion: it would be nice to have the original language for each fragment online as well, I think.