R-Drive Image is described as 'Potent utility providing disk image files creation for backup or duplication purposes. A disk image file contains the exact, byte-by-byte copy of a hard drive, partition or logical disk and can be created with various compression levels on the fly without' and is a Disk Cloning tool in the backup & sync category. There are more than 25 alternatives to R-Drive Image for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best R-Drive Image alternative is Rescuezilla, which is both free and Open Source. Other great apps like R-Drive Image are Clonezilla, Macrium Reflect, Acronis True Image and dd.
Rescuezilla is open source and compatiable with CLonezilla (also open source). These days I looked almost exclusively for open source projects for my tools.
In another life (20 years ago), I was a door-to-door technician and the one tool that was the most invalueable was R Drive Image; but now that I don't work for that company I need something that I don't have to pay for....That's still got all the good features that I want.