phpFileManager a complete filesystem management tool on a single file.
Command line tool for managing Amazon S3 and CloudFront services
This is now also available here github.com/sharkcz/collectl.git
Synchronize directories
File system crawler and disk space usage software
Creates trees and loads into mysql for browsing and searching
Command line utility for versioning-enabled S3 buckets in AWS
Storage management and system installation tool
please use open source- htp://code.google.com/p/off-dup-finder/
Over 600 classes for Web, RFC & File Management