anm is: Anm extension stands for 3D Animation Files. You can open Anm files with Anm file Viewer software.
Anm extension is associated with 3D animation file. Generally it is used with old type 3d computer games. The 3d objects which are found in games animated by benefiting from Anm files. Besides, you have chance to convert anm files to gif. On this topic, you can get detailed information from various web pages.
Anm File format viewers or openers
ANM File Viewer
Anm File related links.