Bulk File Rename is a simple windows form application, which allows complex file renaming within a folder, for all or a selected subset of the files. It supports remove, find/replace, prefix, suffix (root or extension), or “insert at” adjustments, and even supports wild cards and character remapping. See the help screen for examples. It works in Windows XP/Vista/7.

This little utility has saved me from a lot of grief over the years. I originally wrote it in Visual Studio 6 around 2004, and have now migrated it to C#.

Visit the project page for more details.