- Big Foot Project. Terrestrial carbon data for Harvard Forest, 1999-2004.
- Cosmos (Cosmic-ray Soil Moisture Observing System). Landscape-scale measurements of soil moisture at Harvard Forest, since 2011.
- Massachusetts Geographic Information System (MassGIS). Historical and current GIS data for Massachusetts.
- NASA Aeronet (Aerosol Robotic Network). Real-time sun photometer data for Harvard Forest, since 2007.
- Phenocam (Ecosystem Phenology Web Camera Network). Real-time images from the Phenocam network.
- PnET Models. Simulate carbon, water, and nitrogen dynamics.
- USGS National Water Information System. Real-time hydrological data for Massachusetts.