Ubuntu : Boot-Repair20 Jan 2012
A great tool to fix all your GRUB problems and Boot Info Scripts.
After installing Windows 7 (Service Pack 2), my Grub got erased and my MBR got changed to different partition. This small GUI tool handled all the problems and got a working GRUB.
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update sudo apt-get install boot-repair