The principle that "any product of cofinite topologies is compact" is equivalent (without appealing to the Axiom of Choice) to the Boolean Prime Ideal Theorem.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-fm189-3-5, author = {Eric Schechter}, title = {Kelley's specialization of Tychonoff's Theorem is equivalent to the Boolean Prime Ideal Theorem}, journal = {Fundamenta Mathematicae}, volume = {189}, year = {2006}, pages = {285-288}, zbl = {1105.03044}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm189-3-5} }
Eric Schechter. Kelley's specialization of Tychonoff's Theorem is equivalent to the Boolean Prime Ideal Theorem. Fundamenta Mathematicae, Tome 189 (2006) pp. 285-288. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm189-3-5/