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A spatial nature-sound mixer (rain, fire, ocean, wind, birds) for Mac and iPhone with iCloud sync, an ambient sound app for focus or relaxation.
FreeNo sign-upWorks offline
What to know▼
How it works
Lets you drag sound layers — rain, ocean, fire, wind, birds, thunder and more — onto a canvas and position them spatially around you; with supported AirPods, head tracking anchors the soundscape to the room.
What's different
Places sound layers in three-dimensional space rather than playing a single flat loop, and supports AirPods head tracking.
Pricing
One-time purchase, no subscription.
Best for
Mac and iPhone users who want an ambient soundscape for focus, rest or sleep.
We check every product on this page once a day and record whether it still answers.
Converts an uploaded 3D model into a buildable brick design entirely in the browser, with an exportable parts list, without the file leaving your device.
FreeNo sign-upData stays with you
What to know▼
How it works
Upload an STL/OBJ/GLB/PLY file, compare original and brick versions in 3D, tune size/colors/brick inventory, then export a parts list and layer-by-layer build guide.
What's different
Processing happens locally; the model never leaves your device.
Pricing
Free.
Best for
People designing physical brick builds from a 3D model who want privacy and no signup.
We check every product on this page once a day and record whether it still answers.
A personal iOS travel logbook that turns flights, trains, hikes, and rides into lines on a 3D globe, for travelers who want to track trips and stats privately without an account.
Watch out · No account required and data stays on the device, so nothing syncs across devices by default.
No sign-upData stays with you
What to know▼
How it works
Log flights, trains, hikes, and bike rides; each becomes a line on a 3D globe with stats, 32 achievements, and a shareable Year in Review.
Best for
Travelers who want a private, on-device travel log.
Watch out
No account required and data stays on the device, so nothing syncs across devices by default.
We check every product on this page once a day and record whether it still answers.
A QR-code digital tip jar that lets live performers collect card and digital wallet tips directly into their own Stripe account, shown on a live on-stage display.
No sign-upOpen source
What to know▼
How it works
A QR code lets audiences send card and digital wallet tips directly to a performer's own Stripe account, with a live 3D jar display showing names and messages on stage.
What's different
No platform cut, no signup, open source, and keys never leave the device.
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Upload a floor-plan photo and it auto-detects rooms and walls, then furnishes the space to true scale with AI, with no sign-up and processing kept on-device.
No sign-up
What to know▼
How it works
Upload a floor-plan photo or scan and AI vision detects the rooms and walls automatically, then furnishes the space at true dimensions based on a description of how you live there.
What's different
No tracing or CAD work needed, and no sign-up is required for the core tool; plans are processed on-device.
Best for
People planning a room layout who want true-scale furnishing without learning CAD software.
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A free, browser-based platform that turns real-time microphone audio into 3D particle artwork, with all processing done client-side and no account required.
FreeNo sign-upData stays with you
What to know▼
How it works
Processes microphone audio frequencies in real time entirely inside the browser to generate 3D particle visuals, with no upload or account needed.
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A free browser-based 2D skeletal animation editor for rigging art with bones, IK and spring physics, then exporting to pixiJS, GIF, sprite sheet or video.
FreeNo sign-upNothing to install
What to know▼
How it works
Rig artwork with bones and weighted meshes, add IK and spring physics, keyframe on a dope sheet, then export to pixiJS, GIF, sprite sheet or video, all in-browser with no install or signup.
Pricing
Free.
Best for
Animators and game developers needing quick 2D skeletal animation without installing software.
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A free, open-source site of interactive step-by-step lessons in math, computer science and physics, with animations and quizzes. Built for self-directed students, not developers, despite the compsci content.
FreeNo sign-upOpen source
What to know▼
How it works
Free, open-source interactive lessons in math, computer science, and physics, structured as one knowledge tree you progress through at your own pace, with animations, randomized quizzes, and progress tracking.
What's different
No sign-up and no ads required to use it.
Pricing
Free and open-source.
Best for
Self-directed students learning math, computer science, or physics on their own.
