Romain Simon

→ Every square is equal → Dutch auction: price falls 1% every hour → When the grid is full, its size doubles → The opening price doubles with every expansion → Edition 1 ends at 512 spots Buy your square while you can.

SpaceSim is a free browser-based universe simulator. Travel through a UTC-driven 3D Solar System, inspect source-linked scientific state, observe Earth from a pinned NASA ISS trajectory, build procedural stars, visit compact objects, and collect postcards. Scientific, reconstructed, representative, procedural, experimental, and promotional content are clearly labeled. No signup required.

Largest cross-platform directory of AI agent skills. 100K+ skills, 30+ platforms, security audits on every listing. One search, every platform.