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Proof of Usefulness is HackerNoon’s tech and AI hackathon for developers and startups that want to compete on real adoption rather than pitch quality. Participants submit a live project, generate a PoU report, and publish documentation on HackerNoon for monthly and grand prizes.
AppOrbit is a web-based leaderboard for verified mobile app revenue, with per-app pages showing metrics like MRR, 28-day revenue, downloads, and growth. It helps founders, operators, and researchers compare apps using source-backed figures instead of screenshots or estimates.
Tinypad is a minimalist bookmark launchpad for organizing web links into visible groups instead of browser folder clutter. It supports importing from Safari and Chromium-based browsers, start-page setup, and a free Starter plan plus one-time paid Pro plan.
CentryAI is a subscription tracker that scans Gmail or iCloud inboxes to surface recurring charges, flag unused services, and help you find cancellation paths. It is aimed at people who want to review subscriptions without manual spreadsheets or bank linking.
Paste Switch is a macOS clipboard utility that lets you paste the latest clip and switch to a nearby recent clip with the same shortcut. It is designed to keep you typing in place while working with recent text or image clips.
WP Triage is a WordPress risk scoring and prioritization tool for agencies, freelancers, and WooCommerce operators managing multiple sites. It scores connected installs, surfaces the top issues, and recommends what to fix first.
JoJo Days is a browser-based baby journal and memory book for pregnancy notes, daily milestones, photos, and short videos. It uses private sharing and a one-time payment model after a free 30-day trial.
EasyAR Mega is a large-scale visual positioning system for AR localization and spatial mapping. It helps teams build city-scale navigation, cultural tourism, gaming, and digital twin experiences across indoor and outdoor spaces.
Wins is a Mac window manager that adds system-level arrange, split, preview, and switching tools to macOS. It uses one-time pricing with a 1-day free trial and is built for users who want faster window control without a subscription.
Stigg is a usage runtime for AI products that helps teams meter usage, manage entitlements, and enforce credits and spend controls in real time. It is designed to work with existing billing systems and deployment models, including hosted cloud, BYOC, and BYODB.
Product Patterns is a curated library of real UX patterns, frameworks, and psychology principles drawn from live products. It helps designers, product teams, and researchers study how modern interfaces handle onboarding, trust, discovery, pricing, and other common product interactions.
LocoPast is a location-based history app that maps geotagged Wikipedia stories to real-world streets and landmarks. It runs on iOS, Android and web, with free registration and a paid mobile app.
Upstream is a native macOS FTP and SFTP client for transferring files, managing servers, and editing remote content. The App Store listing describes a free core app plus a one-time paid upgrade for sync, comparison, and other advanced workflow tools.
gitgit.me is a link-in-bio service that lets you put multiple links behind one public URL. It is described as free to create and is aimed at creators, influencers, and businesses.
Themefy is a Chrome extension that replaces the new tab page with animated and interactive backgrounds. It also lets users add practical widgets like Search, Date & Time, and Top Sites.
Yoga Unlock is an iPhone app that blocks distracting apps until you complete a short yoga session. It is aimed at people who want a more intentional way to manage screen time and build healthier app-opening habits.
Image Not Found’s Paint the Cameras Dead campaign provides printable postcards and SVG files that help people notice, map, and respond to surveillance cameras in public space.
CometChat React UI Kit is a prebuilt React chat component library for adding in-app messaging, with optional voice and video calling. It supports React.js, Next.js, React Router, and Astro and is designed to reduce the amount of setup and state handling needed to launch chat UI.
HotkeyClash is a macOS utility that scans running apps, Karabiner, skhd, and system shortcuts to find keyboard shortcut conflicts. It helps you identify which app owns a hotkey and where to change it.
Incoming Secure Pigeon is a browser-based linking product that lets users connect without installing an app. The site says the connection is end-to-end encrypted.