ProductCool - Discover the Best Innovative Tools & Daily Products

Autumn helps AI startups price, meter, and control usage with just 3 API calls. Built on Stripe, it manages subscriptions, usage, and access in one place. No webhooks or backend logic needed. Ideal for early stage teams building LLM and image apps.

Finch is a patient-side health companion built for all — an expecting parent, or just someone navigating the health system. Pregnancy alone involves at least 12 appointments, dozens of test results, and a new vocabulary, coming from different providers in different formats. That's just one example. Whatever your journey, Finch brings it into one clear view, transcribes what was said at your appointments, and translates clinical language into plain English. Free tier available. Finch+ $99/y

Stellar is a lightweight and fast A/B testing platform that allows you to test any website in minutes and is loved by CRO marketers.

Re-launching as fully open-source under Apache 2.0, with an improved state-management architecture, and new components, such as Threaded Comments - advanced comment section featuring Reddit-style threaded discussions. Quality, speed & built-in moderation.

Karsa lets you open a digital dollar account from anywhere. Get a virtual US bank account, save in stablecoins, send/receive from 50+ countries, and soon, spend globally with a Visa card.

Simplify customer communication with advanced CRM dialer solutions designed for seamless workflow automation and call management.

throxy is Y Combinator's first AI native sales agency, booking qualified sales meetings for B2B companies selling into industries where generic outreach fails: manufacturing, logistics, construction. We build lists using proprietary tech, then our sales reps call your buyers. New this month: calls routed to an SDR who speaks the lead's language, so a plant manager in Lyon hears French + a buyer in Munich hears German. You pay for meetings you accept that actually happen. [All SDRs are humans]

This is a guide and resource repository dedicated to the craft of self-education. It addresses the challenge of navigating the vast landscape of knowledge without formal guidance, providing strategies, mindsets, and curated paths for effective autonomous learning. It is for curious individuals, lifelong learners, and aspiring autodidacts who want to take full ownership of their intellectual and skill development.

This is a collection of specialized AI agent skills designed for developers working with Expo and Expo Application Services (EAS). It solves the problem of manual, repetitive tasks in the Expo development lifecycle by providing ready-to-use automation capabilities. These skills are for React Native developers, mobile engineers, and teams who use Expo and want to leverage AI to streamline building, testing, and deployment processes.

Trellis is a native macOS terminal that's more than a terminal: windows, tabs and splits in a sidebar, saved SSH hosts, one-click project tasks, a command palette and scratchpad, plus a CLI and MCP server so scripts and AI agents can drive it. Free, MIT.

Personal AI agents like Muse, Instinct and Dots negotiate refunds for customers. Agent Handshake gives them the same decision however they word it, from your rules and the customer’s live account, checks every reply, and knows when to stop. Works with any support AI.

Hold ⌥ Space in any project and a Liquid Glass ring opens at your cursor. Flick at a slice and let go: Claude Code, Codex or your terminal takes the task, in its own git worktree if you want. When it's served, view the diff, merge it or yeet it. Runs locally.

Run open-source apps on a server that's only yours, without per-seat fees. Pick one of 105 apps and a region, see the exact price, and a few minutes later it runs on its own server with a web address, TLS certificate and nightly encrypted off-site backups. Add your own domain, update, resize or move region from the dashboard. You pay for the server by the hour, capped monthly. The price follows the server, not your headcount.

A Mac app for your existing Dot in ChatGPT. Create a crew with different roles and personalities.

NotiKeep saves the notifications you get on iPhone using the new iOS 27 Shortcuts automation. See messages that were deleted or edited, search everything by app and conversation, and get alerts for words that matter. On-device, no account.

Boltbar is a native macOS AI chat bar. Press ⌥ Space in any app to ask GPT or Claude, then get back to work. Agent mode hands Claude Code or Codex a project with Look/Ask/Edit/Full permissions. MIT, signed and notarized; brew or DMG. Optional €19 supporter license.

Take your tokens anywhere. Use your subscriptions, API keys and local models in Codex and any coding agent, or inside the ChatGPT app on your Mac. Hit a limit and it keeps going. Start a coding session on your home machine from anywhere.

Fraud Blocker is an AI-powered platform that blocks invalid ad traffic from bots, click farms, and AI agents, ensuring enterprises, marketers, and agencies pay only for real clicks and genuine leads. It uses AI agents trained on billions of clicks and IPs to identify sophisticated invalid traffic that traditional filters miss, then explains why each click or IP was blocked. This helps protect budgets, improve conversion quality, and reduce wasted ad spend.

Mudroom runs Claude Code, Codex, Gemini CLI and other agents in a Linux sandbox on a copy of your project, behind a network allowlist. Review the diff like a PR and apply only what you want, with undo. Mac app, plus a CLI for Linux and Windows. Free, MIT.

A free, open-source skill for Claude Code, Codex, and Cursor. Give your agent your app captures and a short brief, and it builds a local screenshot editor in your project. Choose from 18 styles, compare looks in Style Lab, edit the copy, and export every size for iPhone, iPad, Mac, and Android, in multiple languages. No screenshot subscription. It runs locally; your usual agent costs apply. Install: npx skills add ParthJadhav/app-store-screenshots

Our Silly Games is a free home for browser games made with Claude Code or Codex. Install the plugin, say "make me a game about...", and publish. We build it, review it and host it, with multiplayer, leaderboards, saves and phone controllers built in.

A free, open-source CLI that checks every dependency license, transitive ones included, against your project's license, in 10 ecosystems. It reads lockfiles and registry metadata, installs nothing, and gives CI a verdict, not a list.

New since our March launch: a Mac app that lives in the menu bar and cues you from the notch, a voice coach that speaks in your AirPods, and coaching that keeps working with your phone locked. AirPosture turns the motion sensors in your AirPods into a posture coach. When your head drifts forward, a calm voice helps you sit back up. Plus 30-second resets and a weekly view of your posture, with iPhone and Mac in sync. Free for 2 hours a day.

Members of Congress disclose their stock trades, but the data sits in PDFs, and meaningful analysis is often locked behind paywalls. Explore disclosures and rankings from the past year with a free Congress Trades account, and see who actually has alpha: how much each member made and what you’d have made copying them, both measured apples-to-apples against the S&P 500 over the same time period. Find out who files on time and who files late.

Invite stakeholders, clients, or a whole department to Basedash as view-only members. They can open the dashboards, saved charts, automations, and chat history you share with them, run saved charts, use dashboard filters and drilldowns, and export results. They can't create or edit anything, run automations, or chat. Pick the role in the invite dialog, member settings, the API, or an embed sign-in token. Share the numbers, not the edit button.

Yardlet is a free, open-source Mac app for the coding agents you already use. It starts Codex, Claude Code, OpenCode and others with their own CLI and sign-in, and gives them one sidebar, composer and set of approval cards. Sessions stay in each agent's own store, so a task started in Yardlet also opens in the Codex app. It writes nothing into the agents' configuration, so you can stop using it any time. Diffs, a pull request tab, connectors and a browser the agents drive come with it.

LFM3 is Liquid AI’s third generation of Liquid Foundation Models, with open weights and a shared backbone across text, vision, audio, omni and decision models. The first release is six 2B-class models, including a 1.7B text model that fits in about 1 GB at 4-bit and has a 256K context. Liquid says they run on phones, laptops and edge devices and can be fine-tuned on one GPU. Weights are on Hugging Face.