Wondering where to send your latest short SFF masterpiece?
Ralan.com is a fantastic resource. Don’t be misled by that gorgeous 90s decor: it’s regularly and reliably updated (never change, Ralan!).
Locus is also a great source of industry news, and contains a lot of reviews of short SFF that might give you ideas of where to explore further. Locus also does a regular year-in-review of major SFF magazines.
This Facebook group is devoted to posting calls for submissions.
You might also be interested in the Science Fiction Writers’ Association’s list of “qualifying markets”. There’s a note that this list is slated to change in format soon. Qualifying markets must have circulations of 1000+ and pay 8c/word, and meet some other criteria.
And for just a few quick ideas, here’s a recent-ish listicle by Annie Neugebauer, ‘20 Places to Submit Your Speculative Short Stories.’
For the more academic side of things, the LSFRC (London Science Fiction Research Community) are currently doing an excellent job of scooping up relevant Calls for Papers, notices of conferences, etc.: the LSFRC Facebook group is the best place to follow them. And of course there is the ever-effervescent Science Fiction Research Association (founded way back in 1970).