ManageNameExt 1.7.6

ManageNameExt lets you add, remove, or change extensions.... Change the case of the file name or the extension Show or hide extension Purge file name of not Internet characters Suffix or Prefix the file name Change the modification date Other options can also change the appearance of windows icons

Please visit author's website for other version (Carbon or Cocoa) and old versions (PPC, previous systems, etc.).