MeshLab
From Just Solve the File Format Problem
Meshlab[1] is 3D mesh processing software[2], which saves prjects in the MLP, or MLB format.
File Information
MeshLab projects saves references to 3D models used in the project in a tagged ascii format using the extension MLP. Project can also be saved with data encoded into binary with the extension .MLB.
Format Details
Both MLP and MLB projects begin with the ascii[3]:
<!DOCTYPE MeshLabDocument>
<MeshLabProject>
