Cate

Cate rethinks the IDE window model: instead of a fixed panel layout with tabs and splits competing for limited screen space, it gives you an infinite canvas where editors, terminals, browsers, documentation, and AI agents can be placed anywhere, floated, docked into tabs and splits, or detached into their own OS windows. Opening a folder turns it into a workspace, and Cate restores the entire spatial layout the next time you reopen it.

The design specifically accommodates AI agents as first-class panels alongside traditional dev tools — meaning an agent’s output, a browser preview, a terminal, and the code being edited can all be spatially arranged together rather than confined to a sidebar or bottom panel, which matters as agentic coding workflows increasingly involve monitoring multiple concurrent surfaces.

MIT licensed, Cate is localized into English, French, Simplified Chinese, and German, and includes a command palette (Cmd+K) for quick actions, right-click panel creation, and CI-verified releases with tracked download counts.

What You Get

• An infinite-canvas workspace for arranging code editors, terminals, browsers, and docs freely instead of fixed tabs/splits
• First-class AI agent panels alongside traditional dev tools in the same spatial workspace
• Persistent layout restoration — Cate remembers your panel arrangement when you reopen a folder
• A command palette (Cmd+K) and right-click panel creation for quick workspace manipulation

Common Use Cases

• Monitoring multiple AI coding agents, terminals, and a live browser preview simultaneously in one spatial layout
• Organizing a complex multi-service development setup (frontend, backend, docs, terminal) without fighting a fixed panel grid
• Detaching specific panels (like a terminal or browser) into separate OS windows for multi-monitor setups
• Returning to a project with the exact same spatial arrangement of tools as when you left it

Under The Hood

Architecture Cate’s core abstraction is the infinite canvas itself: panels (editors, terminals, browsers, docs, agents) are positioned freely in canvas space rather than slotted into a fixed grid, with docking (tabs/splits) and OS-window detachment as alternative arrangement modes layered on top of the same panel model. Layout persistence per workspace (tied to the opened folder) means the canvas state itself is treated as part of the project, not just a transient UI state.

Tech Stack TypeScript, packaged as a cross-platform desktop application with CI-verified releases tracked via GitHub Actions and download metrics. Localization support spans English, French, Simplified Chinese, and German.

Code Quality Very active, consistently maintained commit history and CI-gated releases with public download tracking reflect a project built for real external distribution rather than an internal prototype; rapid star growth (1,700+ in a short window) suggests the infinite-canvas concept resonates with a segment of developers frustrated by fixed IDE layouts.

What Makes It Unique Most IDEs treat AI agent panels as an add-on to an existing fixed-layout paradigm; Cate’s infinite-canvas design treats agents as equal citizens to editors, terminals, and browsers from the ground up, which matters increasingly as multi-agent and agentic coding workflows require monitoring several concurrent surfaces rather than one linear chat panel.

Self-Hosting

Licensing Model MIT licensed — fully open source with no license key.

Self-Hosting Restrictions Not applicable; it’s a local desktop application with no hosted service.

License Key Required No.