Twine (free) launched today, and it offers a novel approach to the age old problem of meeting other singles. While niche sites like Cupidtino come and go, your Facebook profile, check-ins and activity provide a map of your interests. Twine looks at those interests, the people around you (more or less), and suggests a "twine" for you to try and connect. You then chat semi-anonymously, and if you hit it off you can later reveal your profile pic and personal info.
Design
Twine is absolutely lovely to look at. There's a minimum of buttons, subtle design elements are lovingly crafted and the typography and textures are elegant. The app oozes class, which is good for a singles app.