3.must.tools

must.tools is OpenHunts attempting to be your shortcut to not rotting in tool-search hell, and honestly? The 55% newsletter open rate is actually insane — most founders would kill for half that. It's a curated directory across dev, design, AI, and productivity with a freemium model, so you get the hand-picked list without paying, and they monetize through affiliate deals. The engagement time (3m41s) tells me people aren't just bouncing immediately, which is the one thing directories usually can't crack. It's not groundbreaking, but if the curation stays tight and the discounts are real, it could be the kind of quiet utility you just end up using every week.