Boot disks for Mac

Hi, I'm fairly new to Mac, I do repairs for Windows machines, though, and I do know how to use Macs for basics. I was wondering if there was any kind of a boot disk that would be useful for troubleshooting in Mac, as there are plenty for Windows. I know I could use the disk that came with the Mac for various purposes, besides re-installation. What I'm looking for is another boot disk, if it exists, with more options. Thanks everyone.

 

Thanks very much for the replies.