Wikipedia has some great information about Professional Indemnity Insurance. I would start there. If that doesn't answer your questions, you could check the library.
Hospital indemnity insurance is an insurance that covers hospital stays at a fixed rate. You can learn more about them through various websites a good place to start is http://www.aarphealthcare.com/understanding-health-products/hospital-indemnity-insurance.html
Generally the best place to find information on professional insurance is with a national group for your profession. For instance, if one is a counselor they can secure insurance through the American Counseling Association.
There are several insurance companies that can cover just about anything. Typically if a home is near a natural disaster area (such as a place that can be hit by a mudslide or tornado), an insurance company such as Allstate will probably have you purchase building indemnity insurance. A person would have to have experience to give an opinion on this subjective question to truly answer what a good company is.
A supplemental or an indemnity policy will work in conjunction with your Major Medical policy, you may have to file the claims yourself though. The best place to look for an indemnity for good overall coverage is Homeland Healthcare.
Insurance laws and costs vary widely from place to place. Your Best source of information for your state would be local Insurance Agent.
Travelcritic.com has a extensive collection of information about travel insurance and travel insurance providers. This is probably the best place to find good information.
If you are looking for more information on Does driver insurance vary, the best place to look for the information is on www.rmiia.org/auto/teens/Buying_Auto_Insurance.asp
If you are looking for more information on What is the general car insurance like, the best place to look for the information is on www.thegeneral.com/commercials/
The best place to find information on Boots Travel Insurance is on the Boots company website, which has plenty of information available on different travel insurance packages. Reviews and other information can also be found on Travel Insurance Compare, Street Directory and Insurance Roundup.
The best place to find out information about AIG home insurance is through the AIG website. There will be information there to go through and research.
Insurance information for an Aston Martin can be obtained through one's insurance company. Information and rates may vary based on an individual's driving record and place of residence.
The best place to find information about GMAC Insurance would be the official GMAC Insurance website. Contacting a GMAC branch near you can provide you with an auto insurance quote.