Winrar paid; mother of rar file management...
7Zip , ZipGenius free...
For rar files
Try Restoration for restoring delete files.
Convert what?
U can convert only some files to others.. not anythin to anythin.
Want to convert rar files? Extract them, then use the zip sw listed to again compress them to a new format!
BTW... 2 online file converters...
Also.. Adobe Reader's for pdf files. Portable Documents...