Best Ive Found

There are a number of filename changing utilities on the App Store. This is by far the best one Ive found. It lives up to its claims. Easy user interface that is designed for an efficient workflow and VERY fast renaming, even with very large lists of files. Blows the others away. Excellent job! (Moom, another app of theirs, is also nearly indispensible for me)

EGFStech about Name Mangler 3