An advanced file manager with qss themes and iso and folder previews
garysfm which stands for Gary's File Manager is a file manager with some advanced features. Those features include bulk renaming and folder image previews. I has rather advanced search functions, tab browsing with persistence between launches. It remembers your folder sorting and view options in icon view. It also remembers your active tabs between sessions. It has progress dialog while doing large operations like copying large files, and folders with many files.
python version works on...
Clifire is a command line tool for mass file renaming. It supports regular expression renaming as well as some more user-friendly featurs such as cutting, padding and number formatting.
It is aimed at remote use (e.g. ssh, telnet).