Monosticha Catonis Latin posts primarily based on Marchand’s electronic version of Zatocil’s text, found here. Another online edition can be found at Bibliotheca Augustana. The Cato can also be found in Loeb 284 Minor Latin Poets 584-621. The Greek posts are from Arntzenius’ edition, found here which includes a Latin text with Planudes’ and Scaliger’s translations. I’ve recently been using this more and more for the Latin text as well. For the Latin glosses on the Greek, I’ve used as much as possible the translations themselves, but have found Schrevelius’ bilingual lexicon particular useful in some cases, found here.