NameChanger allows you to quickly and easily rename files. As you type, you can see the changes. You can change names by replacing the first occurrence, replacing the last occurrence, replacing all, wildcard, prepend, append, character removal, case changing, regular expressions, sequence and date. Advanced options for file extensions, selective renaming, and sequence and date. You can also use the Image Browser to arrange photos visually, and you can save a rename to be used later.
The software is free but it is donationware. To support development, please consider donating.