Icelandic Festival of Manitoba invites submissions of poetry and short stories. You don’t need to be of Icelandic descent to submit. https://www.icelandicfestival.com/festival-events/contests/poetry-short-stories
The Calgary-based Frontenac House invites submissions of poetry. http://www.frontenachouse.com/
The Toronto-based Pajama Press invites submissions of children’s books. http://pajamapress.ca/submissions/
Baen Books invites submissions of science fiction & fantasy novels—prefers 100,00 words or more. http://www.baen.com/baen-faq#Manuscript