Tranny Dates is a very popular dating site for transsexual, transvestite, and transgender singles and couples.
When setting up a free account, you select whether you’re a man, woman, couple, or a TS/TV/TG and provide other details.
You can then search the personals based on what you’re looking for - single men, women, couples, TS/TV/TG, and your desired location and age range.
You can look for people who want discreet relationships or 1-on-1 sex; you can also search for members who are interested in alternative activities like bondage and discipline, crossdressing, fetishes, group sex, etc.
Those are my top four recommended services in the "TS dating sites" category.
Just below there are three additional sites that you can check out. They were all created by the makers of DateACrossDresser and TS Dating.com, so they all look similar.
SingleTransexuals.com - Single Transexuals.com is a beautiful TS dating site that signs up members directly, but it also includes members who sign up at TS Dating.com since the two sites are related. Visit the website.