yo.directory
In short: Getting listed on Yo.directory is free, with optional paid upgrades. Plan for about 10 minutes — it is a form plus links and assets you already have.
What they ask for: Submit your tool to product-launch/tools category.
Submit your tool to product-launch/tools category.
Use original description; avoid duplicated copy.
Open the submission page on yo.directory and complete its form — that is the "Open submit page" link at the top of this page.
Use original description; avoid duplicated copy.
Priority sets the band — this one is medium. Cost (free + paid tier) and effort (quick) move it within that band, which puts it in the useful tier. The score orders a submission queue. It is not a measure of the site’s domain authority, traffic or quality.