FileInfo.com - The File Extensions Resource

.RRR File Extension

File Type 1	Registry Mechanic Backup File (Most common)
File Format	File
Common?	No
File Description	Backup file containing entries from the Windows registry; created by Registry Mechanic when optimizing the registry; used to restore removed registry entries if necessary. Registry backups may be restored by clicking the "Restore Backup" button in the main program window; it may be necessary to restart the computer for the restored registry entries to load correctly.
Program(s) that open rrr files	Windows: PC Tools Registry Mechanic

File Type 2	Rhapzodé Resource Repository
File Format	Proprietary File
Common?	No
File Description	XML file used by Rhapzodé that manages how a compiled PowerPoint presentation is displayed; enables the author to customize the way the content is presented to viewers; contains directives and pointers to the content, but not the presentation content itself.
Program(s) that open rrr files	Windows: altaVENTE Rhapzodé PowerPoint compiler

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/rrr