A portable file rename tool. File rename tool can rename, lowcase, upcase large numbers of files. It's a quick and powerful tool written in C with extended regular expression supporting for searching and substituting pattern strings in filenames.
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Freename Alternatives
Freename is described as 'When you use Freename to rename a bunch of files, it will send a text file with all filenames to your text editor. At that point, you can use all available tools of your text editor to change the filenames into whatever you want them to be' and is a File Renamer in the file management category. There are more than 25 alternatives to Freename for a variety of platforms, including Windows, Linux, Mac, BSD and Flathub apps. The best Freename alternative is Bulk Rename Utility. It's not free, so if you're looking for a free alternative, you could try Bulk Rename Utility or Ant Renamer. Other great apps like Freename are ReNamer, Rename Master, KRename and Simplest File Renamer.