Online dating has come a long way in a relatively short period of time. In the past, the online dating options available to singles (or people in open relationships) were fewer and further between. Worse, at the time, free online dating options were often either highly sketchy, putting your identity and privacy at risk, or simply did not have the membership numbers to give you a worthwhile experience.
One thing to note if you don't fall into the cis-hetero dating pool: While most of the apps reviewed here are inclusive, there are those that are friendlier to the LGBTQ community than others. For example, OkCupid goes beyond forcing users to choose between being a male or female, including options like Hijra, genderfluid, and two-spirit. If you're a man seeking a man or a woman seeking a woman, you'll want to steer clear of eharmony: It doesn't even give you the option of a same-sex match.