Hollow is a modular workspace app that lets you build, organize, and customize your own tools in a flexible, card-based environment. Unlike traditional apps that force fixed layouts and limited customization, Hollow gives you the freedom to design your digital workspace exactly the way you need it. Each tool is a "deck of cards," and you can create multiple versions of a tool by spawning individual cards, styling them, and arranging them however you want.

What makes Hollow special is its deck-and-card system instead of installing rigid plugins, you build tools as decks and use them dynamically as cards, allowing limitless variations of the same tool in one workspace. There's no cloud lock-in; all your data stays locally on your device. The interface is designed to feel like a tiling window manager but much easier to use, extend, and personalize, even without coding experience. Hollow focuses on flexibility, local-first privacy, and user-driven customization, giving creators a unique playground to craft their own digital workflows.