Want to clean up a 3D scan? Possibly turn it into a 3D print? These programs can take you to the next level with your 3D creations.
A free, open source program, MeshLab can help in cleaning up 3D models. This program is great for when a 3D scan has holes or debris that is not a part of the object. It is also great for helping to get your model prepared for 3D printing.
Meshmixer is another program that can fix mesh problems and prepare for 3D printing. Simpler than MeshLab, this program has a limited free version, or a paid professional version.
Microsoft now offers a service where you can upload your 3D file and they will repair it for you. This service may be useful to those who don't have enough time to learn the above programs. This service is powered through AutoDesk NetFabb.