on spec, a quarterly magazine, started in 1989 to fill a need for a place where Canadian authors could write speculative fiction from a Canadian’s perspective, though they have published authors from other countries.
They accept online and snail mail submissions and try to respond within four months.
on spec offers payment for publication, part of which is a years subscription. The payment scale, based on word count, is detailed on the site.
Short stories should be a maximum of 6,000 words.
on spec does not mention multiple or simultaneous submissions.