emv is a tool for mass-renaming files with a text editor. It can perform two pass renaming, link creation, file list splitting, and link target editing. emv logs its actions as shell-script-style mv commands in case you want to undo them. It is quite capable when used with the Vim text editor's visual block changes. emv can also be used non-interactively by providing a Perl expression for renaming files. It's especially useful if you want to see all the files at once and want to think about their names while editing and changing whole groups of files.
sfre (system flight recorder editor) is a script that wraps a text editor or any arbitrary command and implements logging, file locking, and change tracking for the command executed. It is meant for helping system administrators manage a system in tandem without interfering with each other.