Leviathan

The Office Harness for AI Agents — Spreadsheets, Docs, Slides, Canvas, Relational Tables, and PDF in one runtime. This OpenTools listing is based on the project README and GitHub repository metadata, including stars, forks, license, homepage, and active development signals.

CubeSandbox is an open-source secure sandbox service for AI agents from Tencent Cloud. The repository describes a RustVMM and KVM-based runtime that creates hardware-isolated sandboxes in under 60 ms with less than 5 MB of per-instance overhead, supports single-node and multi-node deployments, and offers an E2B-compatible interface for agent code execution.

Personal AI Infrastructure is an open-source Claude Code environment from Daniel Miessler for personal agents, skills, workflows, hooks, memory files, ideal-state planning, and a local Pulse dashboard. It helps advanced users turn recurring agent work into readable local files.