Between the two of them all my renaming needs are covered, but I use this one extensively in my addon pack making cos it let's me quickly rename files for my packs to 8:3 compliance and it alerts me of file name collisions in the process.
Rename Master v2.7.5
LINK: MrsP_Rename_Master_Addon_v2.7.5-070815
MD5: B06411D48842557C965122337D7E717A
SIZE: 427 KB
Description: Utility to rename groups of files or folders
Op System: Windows 2000, XP & 2003 (x86 only)
Builddate: 2007/07/12
Language: English
Title: Rename Master
Version: 2.7.5
License: Freeware
Website: http://www.joejoesoft.com/vcms/108/
Installs to: "%programfiles%\Desktop\RenameMaster"
Uninstaller: Removes program files, shortcuts, reg entries and personal settings
JoeJoeSoft Rename Master
Rename Master is a free utility for renaming large groups of files with a few clicks. Anyone that has worked with websites, file archives, or collections of music, videos, or pictures has probably spent way too much time renaming hundreds of files.
This utility will add, remove, or replace parts of the filename with ease and also supports renaming via file properties, MP3 tags, JPEG JFIF and EXIF tags. Batch renaming that's simple to use, yet still very powerful.
This version is written in Delphi 6 and should run on any Windows OS.
Features:
* Intelligent number sorting.
* JPEG/MP3 tag support and many more Meta-Variables.
* Auto-Preview support.
* "Scipts" to save commonly used renaming options.
* [*] and [?] command prompt style wildcards for replacing and remove options.
* "Undo" button so a renaming operation can be rolled back.
* Floating thumbnail window for viewing pictures and optional thumbnail file list view.
* Optional Explorer integration for right-clicking on folders or using "Send To".[/color]

Enjoy (or not)

[Edit 2006/03/08] Recoded ALL Mrs Peel Addon Packs for platform and licencing compliance.
[Edit 2006/04/03] Updated to version 2.7.3, added config and shell menu entries for directories.
[Edit 2006/04/04] Added an extra shell menu entry for drives.
[Edit 2007/06/20] Updated to version 2.7.4
[Edit 2007/08/15] Updated to version 2.7.5 and rebuilt with uninstaller