Plenty of Fish is a free online dating site with a large user base and a handful of matching features that are unique to the site, including personality quizes and 'top match' recommendations. The site isn't so pretty on the outside, but is a simplistic way to meet a wide variety of singles in a short amount of time.
Plenty of Fish is free and, despite an overtly outdated user interface, is highly popular among online daters. If you can get past the blatantly-neglected design, you'll find site offers a quick way to meet other singles and gain a solid amount of information about each user. The app is easier to navigate than the site, hands down, but the desktop version is best for setting up your profile and taking the detailed personality tests. Like most traditional online dating sites, communication is conducted via messages, which makes it easy to get a conversation rolling. The site does offer some perks you don't on some of the bigger-named sites, such as a section to input what you are looking for (casual, relationship, etc.) and a section where users showcase their personality type, such as Adventurer or Artist.