One of the best free websites for dating is Plenty of Fish. You can look for a mate of the opposite gender or the same, and there are plenty of people within the POF community to ensure that there's someone there for you.
The best way to search for a dating site is to see the successful rate. This is the rate at which people are able to hook up with one another after using the site. This information can be found by finding site reviews.
I think the best online dating site in Moldova is MoldovaBestOf
The best ranked dating website is matched.com based upon consumers' reviews. The second best ranked dating website, the best advertised one, is eHarmony.com.
There are many places on the internet where one can look for tips for dating women. A specific example of this would be www.dating-site-advisor.com. This site has helped me in the past and I'm sure will work for your friend too.
There are a few medical professional dating sites The best dating site to try would be eHarmony.
For the cupid dating site, it is basically an online dating site. There you can fill out a profile and look at other peoples profile and see if you are similar or matched.
The best online dating site for a mature gay man is Match or Zoosk.
The best free dating site is OKCupid. It has a highly advanced algorithm to find you the perfect match and is 100% free. You answer a few questions on your ethics, what you look for in a mate, what you like to do in your spare time etc. and it suggests people that are compatible for you.
badoo.com
omegle.com
There are many dating sites out there. Here is a top comparison of the best online dating sites to use: dating.about.com/od/site reviews/TP/OnlineSites.htm
The best online dating site is at datethisone dot com. The clients on that site are well respected and are serious about giving everyone respect on the site.