This list was compiled by Ada Hoffmann and posted in the comments, but it’s worth making a separate entry for it. Thank you Ada! This is exactly the kind of stuff I was looking for.

I’ve added some formatting, and I should probably take the time to add links to the magazine names as well…

So far the list only includes English-language markets that also publish speculative fiction. (Are there any markets that do not buy spec fic but buy spec fic reviews? I don’t know of any offhand, and they are not in Duotrope.)

***

Aoife’s Kiss: 0-2000 words. No horror. Pays $7.
Basement Stories: 0-3000 words. Pays 3 cents/word.
Beyond Centauri: Ages 10 and up. 0-1500 words. Pays $7.
Big Pulp: 0-2500 words. Pays 1 cent/word. Takes “non-fiction”; unclear if this includes reviews.
Breath & Shadow: 0-3000 words (pieces up to 5000 may be considered). Must be written by a person with a disability and be related to people with disabilities.
Dark Discoveries: 500-6500 words. Horror/dark only. Pays 5 cents/word. *Appears* to take reviews (it takes “non-fiction”, and many reviews are posted from a variety of reviewers) but doesn’t specifically say so.
Eternal Haunted Summer: No clear word limit. Pays $5. Material reviewed must have a pagan focus or otherwise be of interest to a pagan readership.
Expanded Horizons: Reviews and essays related to underrepresented groups in spec fic. Pays $30.
The Future Fire: 500-1500 words. Pay unclear and may not exist; they do pay $20 for stories and don’t mention anything about review pay.
the.gloaming: 0-2500 words. Pays 1 cent/word. Takes “non-fiction”; unclear if this includes reviews.
Hungur: 0-2000 words. Pays $7. Vampire stories only.
Kaleidotrope: No clear word limit. Pays 1 cent/word.
NewMyths: 0-10,000 words. Pays $40.
The Pedestal: 850-1000 words. Pays 2 cents/word.
Phantasmacore: No clear word limit. Pays $1.
Plutonian Times: No clear word limit. Pays $1.
Port Iris: Length and payment negotiable on query.
The Rejected Quarterly: 0-8000 words. Pays $20.
Shroud Magazine: 0-3000 words. Horror/dark only. Pays $25. Accepts reviews on a case by case basis.
Something Wicked: 800-1500 words. Pays $50.
Sounds of the Night: 0-2000 words. Pays $7.
Strange Horizons: 1000+ words. Prefers 1500-2000 words. Pays $20.
Sybil’s Garage: Length and payment negotiable on query.
Witches & Pagans: Review guidelines available on request. Focused on pagan issues, obviously.