Mesh Heal add-on for Blender
Mesh Heal is an add-on for Blender. It includes additional Blender operators for healing surface meshes. By default, Blender contains many routines that are meant for these tasks. Unfortunately, Blender’s default routines don’t always produce good results in some difficult cases. Specifically, I run into problems when I was trying to convert non-manifold isosurfaces into manifold surfaces with consistent face normals appropriate for volumetric rendering.
Documenatation is located in the doc folder in the add-on sources. You can also view documentation here.