A selection of major publishers accepting unsolicited manuscripts*:
HarperCollins (US), digital first Avon Impulse (romance) (check for submission windows)
Hachette Australia: general email subs (fiction, non-fiction, children’s; some genres excluded)
Allen & Unwin, Friday Pitch (any day!)
Pan Macmillan, Online submission (note preferred genres)
Penguin Random House Australia (first week of the month, email only, some genres excluded); children’s (Feb-Nov) and picture books (Apr-Nov) at children’s
Harlequin
Carina Press: Harlequin digital-first imprint
Bloomsbury Spark, digital imprint (teen, YA, new adult, 25-60k words)
Jo Fletcher Books (Quercus speculative fiction imprint)
And agency Curtis Brown is open to unsolicited online submissions: check out the Curtis Brown guidelines here.
WHO ELSE?
Google is your friend, but subscribing to free e-newsletters from writers’ centres will also provide current opportunities (members will usually get access to more).
Also see searchable Duo.trope (pay wall)
For speculative fiction markets and contests: ralan.com
Familiarise yourself with competitions offering publication (see state literary awards and contests such as GriffithREVIEW‘s novella project and Seizure’s Viva la Novella contest) [always check conditions of entry when entering any contest, especially for which rights might be claimed by the publisher]
* Read guidelines carefully. I know nothing more about these programs than what’s on the websites.
Updated 17 July 2020
