Vifm is a curses file manager with Vim-like everything.
The ultimate cataloguer
Fileaxy does file sync, de-duplication, image matching & bulk preview
Batch Images Converter
cp and mv extended with checksum verification
Tagging system for local files
at new home :-) https://github.com/supermurat/hamsi-manager
A simple application that renames files from one extension to another
A fast, programmer-friendly, free CSV library for Java
a new archiving system
Keeping track for documents
Copies files conditionally using MD5 checksums
Smart auto renaming of a numbered list of files
Split your files with GUI Platform Independent Tool
Disk Wiping Software