Freeware Descriptions:
Un-Rar-Dirs periodically searches through a directory structure for rar files. Rar files are extracted into the directory that contains the rar file. Once a file has been extract it is tracked so that it will not be extracted again.
Here is complete features (taken from authors site):
Un-Rar-Dirs is a system tray only application written in Java. All features can be accessed via the system tray menu. A log of all file extraction attempts is maintained.
Requires Java Runtime Environment (JRE) 1.6 or above.

File Size / OS:
- 970 KB / Windows 9x - ME - 2000 - NT - XP - 2003 - Vista
Download Un-Rar-Dirs 1.2.2: