For those who aren't members of the Paying Writers Jobs e-mail list, here's a new market listing resource that I nabbed from a recent PWJ edition: The Ivory Tower.
They announce themselves as 100% contest free, and have organized their market listings by category: Adventure, Horror, Literary, Youth, etc. Their links are supposed to take you directly to the active submissions page(s) of each publication listed, and a bit of clicking around showed this to be consistently true.
This is very handy for getting quick information, but don't forget that one of the best ways of getting your query accepted is knowing the publication. So, start at the submissions page, but don't stop there. Make sure to explore the entire publication - if you can't do it online, check bookstores, libraries, or find out if they offer a sample issue.