Reefy - mentioned here / GitHub
Fork of Swiftfin as the author was fed up with the lack of updates.
$8.99 one-time IAP

JellyTV - Homepage
£1.99/month, £29.99/year (looks like there's a discounted option at £14.99/year), or £39.99 for life.

The maths is not quite mathing here as the for-life IAP is £39.99, the familiy upgrade is another £39.99 which makes £79.98 total --- but the "family-for-life" option is £89.99 for some reason. (Makes you wonder whether this was vibe-coded.)

Neptune - Homepage
Currently in beta and you need to ask on their Discord for the Testflight link.

Has anyone tried any of these?