Eddy3D is a CFD simulation software for natural ventilation and outdoor comfort analysis. While natural ventilation can reduce cooling loads, modeling it is complex due to numerous variables, making simulations costly and slow. Eddy simplifies this with an intuitive interface for architects and urban designers, enabling natural ventilation simulations from the early design stages. It also offers optimized meshing methods for urban wind flow models and generates wind pressure coefficients for airflow network simulations.

Urbano.io is an intuitive urban design tool that imports urban data from OpenStreetMap into Rhino, enabling users to create contextual models for everything from simple visualizations to complex mobility simulations using street grids. Urbano.io supports terrain, allowing users to build 3D site models with terrain, buildings, and streets in just one click. Designed to promote walkable neighborhoods, Urbano.io helps assess the impact of design decisions on street networks, density, program allocation, and amenities. It introduces three key metrics—Walkscore, Streetscore, and Amenityscore—and offers fast, actionable design feedback through a simple trip-sending algorithm.

Archsim Energy Modeling was one of the first tools for Rhino/Grasshopper to integrate EnergyPlus simulations with parametric design. It enables users to create and simulate complex multi-zone energy models, visualize results, and explore early-stage design options like building shape, window-to-wall ratios, facades, and passive strategies such as shading and natural ventilation. Archsim supports advanced daylighting, shading controls, natural ventilation, simple HVAC, photovoltaics, and phase-changing materials. Simulation inputs—geometry, materials, constructions, and zone profiles—are fully parametric and can be linked with optimization algorithms in Grasshopper.

Urban Daylight is a two-step process for simulating and evaluating urban daylight potential. It uses Radiance/Daysim to compute solar radiation levels on urban facades and then converts these into interior illuminance distributions. The tool provides near-instant simulation feedback in the Rhinoceros3D environment and matches traditional predictions within a 10% margin of error with less computational overhead.

Umi is a Rhino-based design tool for architects and urban planners to model the environmental performance of neighborhoods and cities, focusing on operational and embodied energy, walkability, and daylight potential. Developed since 2012 by MIT's Sustainable Design Lab with support from various organizations, including the NSF, MIT Energy Initiative, and Transsolar Climate Engineering. The first public version was launched in May 2013.