MakeHuman is a free and open source 3D computer graphics middleware designed for the prototyping of photorealistic humanoids. It is possible to import MakeHuman models and armatures (rigs) into Blender and animate them. Use this tag for Blender-specific questions about importing, rigging, and using MakeHuman models in Blender.
Wikipedia describes MakeHuman as
a free and open source 3D computer graphics middleware designed for the prototyping of photorealistic humanoids.
MakeHuman Community edition provides tools for exporting models, possibly including armatures (rigs) in a format that can be imported and used by Blender, often using a file format called MHX2. (MakeHuman Export V2)
Use this tag for Blender specific questions pertaining to importing and using MakeHuman models and rigs.