Web3 Canvas publishes a catalog of startups and software that founders can still join.
Directories with a public submission form
These sites take a URL through a form rather than a public profile or a guest article.
1010 destinations
There's An AI is a catalog of AI products: you can list a tool there, and people browse what already exists.
Resource.fyi publishes a catalog of startups and software that founders can still join.
AwesomeIndie publishes a catalog of startups and software that founders can still join.
SaaSBison publishes a catalog of startups and software that founders can still join.
SubmitHunt publishes a catalog of startups and software that founders can still join.
Alpha Digits publishes a catalog of startups and software that founders can still join.
Apps Mamma publishes a catalog of startups and software that founders can still join.
Apps Mirror publishes a catalog of startups and software that founders can still join.
Apps Thunder publishes a catalog of startups and software that founders can still join.
Ask Your Android publishes a catalog of startups and software that founders can still join.
Bloombuzz publishes a catalog of startups and software that founders can still join.
Emoji Launch publishes a catalog of startups and software that founders can still join.
Growing Page publishes a catalog of startups and software that founders can still join.
Inbox World publishes a catalog of startups and software that founders can still join.
IndieTool publishes a catalog of startups and software that founders can still join.
Joinly publishes a catalog of startups and software that founders can still join.
My Startup Tool publishes a catalog of startups and software that founders can still join.
Neede publishes a catalog of startups and software that founders can still join.
Profit Hunt publishes a catalog of startups and software that founders can still join.
Promotehour publishes a catalog of startups and software that founders can still join.
Ready SaaS Go publishes a catalog of startups and software that founders can still join.
ScoutForge publishes a catalog of startups and software that founders can still join.
Space Bandits publishes a catalog of startups and software that founders can still join.
When a submission form is the right door
A form is the usual path for product directories: you send a URL, a short description, and often a logo. Approval is not automatic, and the link can be dofollow or nofollow.