As well as many private individuals using it to produce models for raytacing and VRML 3D work. The companies and institutions shown below have licensed AC3D for groups/departments or entire sites.

Commercial sites

• BC Hydro, dam safety surveillance
• BCI Navigation
• BWX Technologies,US
• CHAM Concentration, Heat and Momentum Limited bundle AC3D with their PHOENICS flow simulation software
• Royal Boskalis Westminster nv
• CORYS T.E.S.S.
• CTEC Natual Resources, Canada
• Kirklees Metropolitan Council , UK
• NASA
• NSWC Sim Lab, US
• Sandia National Laboratories
• Siemens IIT, Japan
• South Lakeland District Council
• SP Swedish National Testing and Research Institute
• TFPSoft - Art Department
• Thales Underwater systems, France
• Titan Systems Corp (NASA JSC Virtual Reality Lab)
• Tsien (UK) Ltd.
• USDOT Volpe Center  
• (VW) Volkswagen - Germany

Educational sites

Schools and Colleges

• Arvida Middle School , US
• Broad Oak High School, UK
• Brooklands Middle School, UK
• Burntwood School, UK
• Dessaus Middle School, Texas
• Franklin College, UK
• Glenthorne High School, UK
• The Grove College, UK
• Harrow College, UK
• Hugh Baird College, Bootle, UK
• Hutto Middle School, US
• Lake Oswego High School, US
• Leighton Middle School, UK
• Leiston High School, UK
• Maidstone Grammar School, UK
• Marden High School, UK
• Saint Joseph's College Indiana
• St Gorans Gymnasium, Sweden
• St Mary and All Angels School, California
• City of Sunderland College, UK
• Suwon Science College
• Thomas Coram Middle School, UK
• Waluga Junior High School , US

Universities

• University of Aarhus in Denmark modeling of mouse kidney proximal tubules
• University of Auckland - New Zealand
• Abo Akademi University - Finland
• University of Basel, Switzerland visit
• Universidad Bonaterra escuela de Ingenieria 
• IUT Bordeaux, France
• University of Calgary, Canada- Maths and Statistics
• University of California, Irvine - Robotics and Automation Lab 
• California State University, Northridge - Computer Science Department
• Carnegie Mellon University - National Robotics Engineering Centre
• Universidad de Castilla-La Mancha
• Cirencester College, UK
• University of Colima in Mexico - Virtual Reality Lab
• Colorado State University - Introduction to Computer Graphics course
• Center for Advanced Technical and Scientific Education, Group ESIEE, France
• Cranfield University, Royal Military College
• Essex University - Electronic Systems Engineering
• Fachhochschule Gelsenkirchen, Germany - University of Applied Sciences
• University of Glamorgan
• University of Glasgow - Computer Science
• Herriot-Watt University- School of Mathematical and Computer Sciences , UK
• The Advanced Visualization Lab at IUB & IUPUI Indiana University Bloomington & Indiana University - Purdue University Indianapolis
• John Hopkins University
• Hong Kong Institute of Education - Department of Science.
• KTH Sweden - Department of Geodesy and Photogrammetry
• Lancaster University - Cooperative Systems Engineering Group (also used on MSc. and undergraduate courses)
• Liverpool John Moores University - School of Computing and Mathematical Sciences
• Loughborough University - Engineering School, UK
• Maersk Mc-Kinney Moller Institute for Production Technology, Denmark
• Universiti Putra, Malaysia - Faculty of Science and Environmental Studies
• University of Manchester - Advanced Interfaces Group
• McGill University ECE, Canada
• University of Montana - Media Arts, US
• Technische Universität München, Department of Informatics in Germany - on a knowledge based systems course.
• Mississippi State University, Engineering Research Center
• MIT - on a graphics course and in a number of departments.
• Nara University of Education, Japan
• University of New South Wales, Australia
• University of North Carolina - used on graphics courses. The students have built some models of amusement park rides
• University of North Carolina at Charlotte, Engineering department.
• University of North Carolina at Charlotte, College of Info. Technology
• Nottingham University - Communication Research Group
• RWTH Aachen University, Germany
• Université de Savoie France
• Shefield Hallam University - Computing and Management Sciences
• SICS - DIVE is a distributed V.R. system which runs on many platforms and reads AC3D model files
• University of Strathclyde - Department of Computer and Information Sciences  
• University of Stuttgart - Institut fur Computeranwendungen
• University of Sunderland - School of Computing, Engineering and Technology
• University of Stuttgart - CSV Computersimulation and Visualisation Some examples of what's been made
• University of Sussex - School of Cognitive & Computing Sciences
• Université of Technologie Compiegne, France
• Toronto York University,  Dept of Computer Science and Engineering
• UCL - Virtual Environments and Graphics Group, UK
• Umeå University Sweden (Computing Department), Sweden
• Universite de Technologie de Compiegne (UTC), France