SigmaOS

SigmaOS is a macOS‑only web browser that reorganizes tabs into vertical lists, treating each tab as a discrete task. Users can mark tabs as completed, lock them for later use, and group them within “workspaces” that function like separate rooms, allowing quick navigation between distinct projects or contexts.

The interface includes a split‑screen mode for side‑by‑side browsing and a “Lazy Search” feature that activates with the spacebar, enabling instant searching across open tabs, bookmarks, commands, and the broader web. An integrated companion named Airis provides contextual assistance: it can answer questions about the current page, explain paragraphs, and perform web searches based on natural‑language queries.

These organizational tools aim to streamline multitasking and information retrieval, making the browser suitable for users who manage many simultaneous web tasks and prefer a task‑oriented view of their browsing sessions.