It has social networking aspects such as a blog and an add a friend feature. OKCupid allows users to create an individual matching system in order to find the most compatible singles.
Soul Mate Find is geared toward people who are trying to find life partners.
While using the site is free, it does require "credits" which you earn by logging in every day or by referring friends to the site.
Casual Kiss is, as the name implies, for those who are looking for something casual.
You'll also get free relationship coaching via blogs and a popular message board.
This site is for people looking for dates and also for casual flings. Date is another one that uses an algorithm to match users.
One advantage is that it's been around since 1997, long enough to have a base of over 5 million users, even though it is a lesser-known site.
You can also view the site in Spanish or Portuguese, which may be helpful if you are bilingual.
Setting up and replying to personal ads online can get expensive.
Fortunately, there are free sites where you can meet your lobster and not break the bank.