I aware that MySQL is pretty reliable and its availablity is quite good.
However, is there any tools that might help in reparing the database just in case there is some kind of table corruption ?

Check the repair command:

http://www.mysql.com/doc/en/Repair.html

The MySQL database structure is thoughtfully designed. Each database is a directory (accessible only to the MySQL daemon), and the tables and their related indexes, etc are stored in separate disk files. This creates a disk structure quite different from the MS-Access ".MDB file," and much more conducive to repair.

A client-server database is inherently more robust than filesever-based systems like Paradox or MS-Access, as long as you carefully observe four things:

• Make sure that it has a good, strong UPS (Uninterruptible Power Supply) box. (Network hardware and such should also have similar equipment.)
• Make sure to use RAID arrays, to guard against failure.
• Make sure to back up the database diligently, and test for actual recovery ability.
• Set up logins and permissions on the database server box correctly.

What I personally do is run the mysqlcheck command with the auto-repair flag on all databases via a cron script once a week. It makes sure that every if in good shape. Then I have it email me any problems.

Donny