Everything in the catalog

Small office suite where the whole document is stored inside the shareable link.

Offline-capable Kanban board for personal tasks with draggable cards and columns.

Flashes firmware to ESP chips from the browser over Web Serial.

Everyone enters when they are free and the tool shows the times that suit the group.

Calculator that works with ranges and uncertain numbers instead of exact values.

Ambient UI gradients made from layered CSS blend modes, with copyable code.

Draws Graphviz DOT graph descriptions as plain-text ASCII diagrams you can paste into code comments.

Minimal typing test with selectable text and time limits.

Offline-capable viewer of tldr-pages command cheat sheets that runs in the browser.

Online player for MIDI and video game music files with SoundFont support and a large song catalog.

Interactive story about how anxiety feeds on itself and a few ways to interrupt it.

Free resume builder with a real-time preview that updates as you edit the fields.

Paste service that keeps the text in the URL fragment, so no database or server storage is needed.

Edits .scad models and renders them to STL in the browser with a WebAssembly build of OpenSCAD.

Web interpreter for text adventures that plays Z-machine, Glulx and other story files from a link or upload.

Draw on and annotate PDFs in the browser without sending the document to a server.

Gives a public channel URL that forwards webhook payloads to your local machine.

Falling-sand simulator with hundreds of materials and reactions you can place and mix.

Generates retro 8-bit sound effects from presets or tweaked parameters and exports WAV files.

Generates retro 8-bit game sound effects from presets or random mutations and exports them as WAV.

Free search of 5e SRD rules, monsters, spells and items from the open-licensed documents, fed by a public API.

Simulates billiard-ball collisions with a physics engine and adjustable elasticity.

Simulates a chaotic double pendulum with adjustable parameters and phase graphs.

Simulates a mass on a spring with damping and plots displacement over time.