Seven free tools that do real work: validate an idea, check a name's domains, roast a landing page, size a market, model runway, grade a pricing page, and decide whether to kill a venture. Four run entirely in your browser and are free forever. Three call the engine and are capped per day, because they cost us real inference. None of them need an account.
Every tool sits inside a step-by-step SOP that says when to reach for it and what to do with the answer.