Bulk File Rename allows renaming of files in a standard Windows Form (instead of the command line ren command), and allows a variety of techniques for renaming: Remove Text, Replace Text, Prefix Root, Suffix Root, Prefix Extension, Suffix Extension, Insert At. Replace allows character remapping. Includes a preview of the file changes which will occur.
It is easy to use and it does exactly what it says. I have no experience with support because I have never needed any. I do not use the program frequently, but when I do, I am thankful to the author for creating it. Thank you John Shultz!