Rename your files with regular expressions in batch mode.
NamEx lets you easily rename groups of files using regular expressions. It's all about the combination of a non-destructive preview system, quick recall for your commonly used replace patterns, and instant access to a regular expression quick reference. It features mouse-over regular expression reference, preview renames before committing them to your file system, file match pattern can also be used to select files for deletion, and automatic update check.