Welcome to J. Rosenthal Software!
The IT company was founded in 1996. Since 2002, we have been specializing in the development of software. Today, we provide our software to companies and government organizations around the world.
The professional solution for managing your master key systems and key issuance
• English
• Español
Freeware - Little helpers
Anti-Twin is a small software application which compares files, i.e. it searches for duplicate or similar files on your hard disk drive.
• Anti-Twin
We are currently working on the following projects:

• Webserver software with database capabilities
• Document format with integrated databases