https://rxbulb.com (medical ai)
Disclosure, it's mine and it's paid per job returned: https://apify.com/cleanrowdata/fresh-jobs-index. Next up is per-company hiring rollups. Curious which filters people would actually use.
You might be surprised by what people build with domain data.
Also have some other cool browser-based 3d game projects listed here: https://brynnbateman.com/